Presentation

200.  Dohyun Kim, Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Polytype family representation of adaptive structures in Ta2O5 and its extension to insulating MO2 (M=V, Nb, Ta) phases from First Principles,"  The Korean Ceramic Society Fall Meeting, 2025.10.15~17, COEX, Korea.

199.  Taeyoung Jeong, Seungjae Yoon, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi, ""An integrated framework for atomic-scale parameter extraction toward multiscale modeling of RRAM devices: aRPaCa and VacHopPy" MEMRISYS 2025, 2025.10.13~16, Edinburgh, UK.

198. Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "VacHopPy: A Python package for extracting effective vacancy hopping parameters from ab initio molecular dynamics for multiscale modeling," The 1st Korean Workshop on Computational Electronics, 2025.7.23, KAIST, Korea.

197.  Yunjae Kim, Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Comparison of Switching Mechanisms in Ferroelectric Wurtzite AlN," ESCW2025, 2025.7.10~11, KIAS, Korea.

196.  Dohyun Kim, Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Structural and Electronic Properties of Oxygen-Deficient TaOx (x=2~2.5) with γ~anatase and B~rutile Phases," ESCW2025, 2025.7.10~11, KIAS, Korea.

195. Seungjae Yoon, Wonho Cho, Byongwoo Par, Taeyoung Jeong, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Semimetallic Transition Metal Telluride Contacts for p-type Te-Channel Thin Film Transistors," ESCW2025, 2025.7.10~11, KIAS, Korea. 

194. Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Effective Parameter Extraction for Vacancy-mediated Diffusion from Ab Initio Molecular Dynamics," ESCW2025, 2025.7.10~11, KIAS, Korea.

193. Yunjae Kim, Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Ab initio Study on Polarization-Screening Charge Distribution in AlScN Horizontal Domain Walls," The 32th Korean Conference on Semiconductors (KCS 2025), 12-14, Feb. 2025, High1, Korea.

192. Dohyun Kim, Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Effects of Stoichiometry on the Dual Trap Levels in Ta2O5 Estimated by First Principles Calculations," The 32th Korean Conference on Semiconductors (KCS 2025), 12-14, Feb. 2025, High1, Korea.

191. Seungjae Yoon, Wonho Choi, Byongwoo Park, Taeyoung Jeong, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Comparative Theoretical Study on Metal and Semimetal Electrodes with Top and Edge Contacts in Te p-Type Channels," The 32th Korean Conference on Semiconductors (KCS 2025), 12-14, Feb. 2025, High1, Korea.

190. Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Accurate Extraction of Mass Transport Parameters for Device Simulations Using Ab Initio Molecular Dynamics," The 32th Korean Conference on Semiconductors (KCS 2025), 12-14, Feb. 2025, High1, Korea. (On-site Excellent Poster Award in Session G : Device & Process Modeling, Simulation and Reliability)

189. Taeyoung Jeong, Janguk Han, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang and Jung-Hae Choi*, "A combined approach of numerical and ab initio calculations on Ag/HfO2/RuO2 diffusive memristor for probabilisitic computation application," MEMRISYS 2024, 2024.11.10~13, Seoul, Korea.

188. Taeyoung Jeong, Cheol Seong Hwang and Jung-Hae Choi*, "Ab initio study on charge transition-driven resistive switching in Pt/TiO₂/Ti devices," MEMRISYS 2024, 2024.11.10~13, Seoul, Korea. (Invited)

187. Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang*, and Jung-Hae Choi*, "Three-dimensional Ferroelectric Switching Mechanism and Coercive Field in HfO2 and ZrO2: Ab initio Approach," 2024 Wiley Forum Fall Meeting;  Intelligent Materials, Devices and Systems for AI, 2024.10.10~12, University of Seoul, Korea. (Invited)

186. Taeyoung Jeong, Janguk Han, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang and Jung-Hae Choi*, "Physical model of Ag/HfO2/RuO2 diffusive memristor for p-computing application," poster, ESCW2024, 2024.7.11~12, KIAS, Korea.

185. Seungjae Yoon, Kun Hee Ye, Taeyoung Jeong, Dohyun Kim, Yunjae Kim, Cheol Seong Hwang and Jung-Hae Choi*, "Schottky Barrier Modulation via Oxygen Vacancy-Induced Gap States in RuO2(110)/TiO2(110) for Interface-Type Resistive Switching," poster, ESCW2024, 2024.7.11~12, KIAS, Korea.

184. Dohyun Kim, Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Yunjae Kim, Cheol Seong Hwang and Jung-Hae Choi*, "Polytypicc Variants of the Adaptive Ta2O5 Structures," poster, ESCW2024, 2024.7.11~12, KIAS, Korea.

183. Jung-Hae Choi*, Kun Hee Ye, Taeyoung Jeong, "Extending First-Principles Calculation-Based Semiconductor Material Research towards Engineering Ceramics," 5th International Symposium on New Frontier of Advanced Si-Based Ceramics and Composites (ISASC 2024), 16-19, June, 2024, Jeju, Korea. (Invited)

182. Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "DFT Study on Charge Transition of Oxygen Vacancies in TiO₂-based Resistive Random Access Memory," The Korean Ceramic Society Fall Meeting, 2023.10.18~20, COEX, Korea.

181. Taeyoung Jeong, Cheol Seong Hwang, and Jung-Hae Choi*, "An atomistic understanding of the oxygen vacancies in Pt/TiO₂/Ti resistive random access memory: ab initio study," ULSIC vsTFT 8, 13-18, May, 2023, Sapporo, Hokkaido, Japan. (Invited)

180. Dohyun Kim, Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Cheol Seong Hwang, and Jung-Hae Choi*, "Sub-stoichiometric Adaptive Phase of Conducting Filament in Ta₂O5-based Resistive Switching Materials by First Principles Calculations," The 30th Korean Conference on Semiconductors (KCS 2023), 13-15, Feb. 2023, High1, Korea.

179. Seungjae Yoon, Taeyoung Jeong, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Structural and Electrical Properties of the Conducting filaments in HfO₂-based Resistive Switching Materials by First Principles Calculations," The 30th Korean Conference on Semiconductors (KCS 2023), 13-15, Feb. 2023, High1, Korea. (On-site Excellent Poster Award in Session G : Device & Process Modeling, Simulation and Reliability)

178. Taeyoung Jeong, Kun Hee Ye, Seungjae Yoon, Dohyun Kim, Cheol Seong Hwang, and Jung-Hae Choi*, "Charge transition mechanism to explain eight-wise polarity observed in a Ti/TiO₂/Pt ReRAM device," The 30th Korean Conference on Semiconductors (KCS 2023), 13-15, Feb. 2023, High1, Korea.

177. Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Cheol Seong Hwang, and Jung-Hae Choi*, "First Principles-derived Process Optimization to Control the Phase Fractions of Ferroelectric and Antiferroelectric Hf1-xZrxO₂," The 30th Korean Conference on Semiconductors (KCS 2023), 13-15, Feb. 2023, High1, Korea.

176. Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Cheol Seong Hwang, and Jung-Hae Cho*i, "First principles calculations on the phase formation process and phase fraction of ferroelectric/antiferroelectric Hf1-xZrxO2 phases," The Korean Ceramic Society Fall Meeting, 2022.10.24~26, COEX, Korea.

175. Seungjae Yoon, Gyuseung Han, Kun Hee Ye, Taeyoung Jeong, Cheol Seong Hwang, and Jung-Hae Choi*, "Atomistic Understanding of the Strain- and Temperature-Dependent Dielectric Constant of Be0.25Mg0.75O Superlattice," The 29th Korean Conference on Semiconductors (KCS 2022), 24-26, Jan. 2022, High1, Korea.

174. Taeyoung Jeong, Kun Hee Ye, Jihun Kim, Seungjae Yoon, Cheol Seong Hwang, and Jung-Hae Choi*, "Structural and Electrical Properties of Aggregated Charged Oxygen Vacancies in Rutile-based TiO2-x for Resistive Random Access Memory Device," The 29th Korean Conference on Semiconductors (KCS 2022), 24-26, Jan. 2022, High1, Korea. (On-site Excellent Poster Award in Session G : Device & Process Modeling, Simulation and Reliability)

173. Kun Hee Ye, Taeyoung Jeong, Seungjae Yoon, Cheol Seong Hwang, and Jung-Hae Choi*, "Theoretical Understanding of the Phase Formation in (Hf1-xZrx)O2; Effects of Composition, Thermodynamics and Kinetics," The 29th Korean Conference on Semiconductors (KCS 2022), 24-26, Jan. 2022, High1, Korea.

172.  Min Hyuk Park, Han Joon Kim, Gwang Yeop Lee, Jae Hong Park, Young Hwan Lee, Yu Jin Kim, Taehwan Moon, Keum Do Kim, Seung Dam Hyun, Hyun Woo Park, Hye Jung Chang, Jung-Hae Choi, Cheol Seong Hwang, "Ferroelectricity in hafnia/zirconia nanolaminates and superlattices," 8th International Congress on Ceramics (ICC8), 25-30, Apr. 2021, Online, Korea. (Invited)

171.  In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Atomistic Modeling for the Vapor-Phase Growth of GaAs Nanowires: from DFT to Growth Kinetics", poster,  SurfaceScience21, DPG (German Physical Society) Spring Meeting, 1-4, Mar. 2021, online, Germany. 

170.  Kun Hee Ye, Gyuseung Han, In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Theoretical Understanding of the Effects of Composition and Configuration on the Ferroelectric Properties of Wurtzite Structure (Al, Sc)N," oral, The 28th Korean Conference on Semiconductors (KCS 2021), 25-29, Jan. 2021, Online, Korea. 

169.  Gyuseung Han, In Won Yeu, Kun Hee Ye, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Atomistic Design of Be0.25Mg0.75O Superlattice-like Structure as a High-κ Dielectric Layer,"  oral, The 28th Korean Conference on Semiconductors (KCS 2021), 25-29, Jan. 2021, Online, Korea.

168. In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Ab initio Approach on the Anisotropic Growth of GaAs: from DFT to Growth Kinetics,"  oral, The 28th Korean Conference on Semiconductors (KCS 2021), 25-29, Jan. 2021, Online, Korea.

167. Min Hyuk Park, Hye Jung Chang, Jung-Hae Choi, Cheol Seong Hwang, "Ferroelectricity in hafnia/zirconia nanolaminates and superlattices,"  oral, Electronic Materials and Applications 2021 (EMA2021), The American Ceramic Society, 19-22, Jan. 2021, Online.

166. In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Atomistic Understanding on the Surface of GaAs By Ab Initio Thermodynamics; From Equilibrium Shape to Growth Shape," PRiME 2020, The Electrochemical Society, 4-9, Oct, 2020, Online. (Invited) 

165.  Gyuseung Han, In Won Yeu, Kun Hee Ye, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Effects of composition and atomic configuration on the bandgap of Ga(As,Sb) solid solution using cluster expansion and ab initio thermodynamics,"  oral, Nano Korea 2020, 1-3, July, 2020, Kintex (& Online), Korea.

164.  In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Effects of growth condition on the anisotropic growth and stacking behavior of GaAs polar nanowires: ab initio thermodynamics,"  oral, Nano Korea 2020, 1-3, July, 2020, Kintex (& Online), Korea.

163.  Younjin Jang, In Won Yeu, Jun Shik Kim, Sukin Kang, Yonghee Lee, Kwangmin Kim, Whayoung Kim, Jeong Hwan Han, Jung-Hae Choi, and Cheol Seong Hwang, "Atomic-Layer-Deposited Tin Monoxide Channel for p-Type Oxide Thin-Film Transistors," poster, The 27th Korean Conference on Semiconductors (KCS 2020), 12-14, Feb. 2020, High1 Resort, Korea.

162. Kun Hee Ye, Gyuseung Han, In Won Yeu, Beom Yong Kim, Cheol Seong Hwang, and Jung-Hae Choi, "First Principles Study on the Ferroelectricity in (AlN)m/(ScN)n Superlattices,"  poster, The 27th Korean Conference on Semiconductors (KCS 2020), 12-14, Feb. 2020, High1 Resort, Korea.

161. Gyuseung Han, In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Theoretical Understanding and Design of High Dielectric Constant (Be,Mg)O Solid Solution,"  oral, The 27th Korean Conference on Semiconductors (KCS 2020), 12-14, Feb. 2020, High1 Resort, Korea. (Excellent Paper Award in Session C : Material Growth & Characterization)

160. In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, " Atomistic Understanding on the Growth and Stacking-Fault of GaAs Nanowires Grown by Noncatalytic Method,"  oral, The 27th Korean Conference on Semiconductors (KCS 2020), 12-14, Feb. 2020, High1 Resort, Korea.

159. Gyuseung Han, In Won Yeu, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Prediction of the Phase Diagram of III-V Compound Solid Solution under Biaxial Strain using Cluster Expansion and DFT Calculations,"  poster,  ICMS2019 (The 5th International Conference on Molecular Simulation) 2019.11.03~06, Jeju, Korea. 

158.  In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Prediction of the Surface Energy from the Robust Extraction of Local Energy via Atomic Neural Network," poster,  ICMS2019 (The 5th International Conference on Molecular Simulation) 2019.11.03~06, Jeju, Korea. 

157. Jung-Hae Choi, "Equilibrium shape and growth mechanism of III-V semiconductors: ab-initio thermodynamics," 5th Workshop on Supercomputing for Computational Sciences, 2019.7.11~12.KISTI, Daejeon. (Invited) 

156. Gyuseung Han, In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Structure stability and dielectric constant of (Be,Mg)O solid solution," poster, ESCW2019, 2019.7.04~05, KIAS, Korea. 

155.  In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Theoretical understanding on the growth and stacking-fault mechanism of GaAs nanowires grown by catalyst-free method."  poster, ESCW2019, 2019.7.04~05, KIAS, Korea. 

154. In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Growth mechanism of III-V nanowires depending on the temperature and pressure: ab-initio thermodynamic study,"  poster, EuroCVD22-Baltic ALD16, 24-28, Jun, 2019, Luxexpo, Luxembourg.

153 . Gyuseung Han, In Won Yeu, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Phase diagram of Ga(As,Sb) and (In,Ga)As by cluster expansion and DFT calculations,"  oral, The 26th Korean Conference on Semiconductors (KCS 2019), 13-15, Feb. 2019, 웰리힐리파크, Korea.

152 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Effect of the two-dimensional strain on the equilibrium crystal shape of GaAs by ab-initio thermodynamics,"  oral, The 26th Korean Conference on Semiconductors (KCS 2019), 13-15, Feb. 2019, 웰리힐리파크, Korea.

151 . Liu Kai, Eunjung Ko, Cheol Seong Hwang, and Jung-Hae Choi, "Density functional theory study on the interface structure of Ge oxide/Ge[001] nanowire," poster, The 26th Korean Conference on Semiconductors (KCS 2019), 13-15, Feb. 2019, 웰리힐리파크, Korea.

150 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Equilibrium crystal shape of GaAs by ab-initio thermodynamics,"  oral, 9th MMM2018  (International Conference on Multiscale Materials Modeling, 28, Oct~ 02, Nov, 2018, Osaka International Convention Center, Osaka, Japan.

149 . Gyuseung Han, In Won Yeu, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Phase diagram of Ga(As,Sb) and (In,Ga)As by cluster expansion and DFT calculations,"  poster, Asian21 (The 21st Asian Workhop on First-Principles Electronic Structure Calculations), 29~31, Oct. 2018, KAIST, Daejeon, Korea.

148 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Vibrational effects on the surface energy of III-V compound semiconductors using ab-initio thermodynamics,"  poster, Asian21, 29~31, Oct. 2018, KAIST, Daejeon, Korea.

147 . Eunjung Ko, Jaehong Park and Jung-Hae Choi, "First-principles electronic transport properties of Ge/amorphous Al2O3/Au structure,"  poster, Asian21, 29~31, Oct. 2018, KAIST, Daejeon, Korea.

146 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Surface phase diagram of GaAs(001) considering the vibrational thermal energy by ab-initio calculation," oral,  IUMRS-ICEM 2018, 2018.8.19~8.24, Daejon Convention Center, Korea. 

145 . Krishnamohan Thekkepat, Satadeep Bhattacharjee, Mahesh Chandran, Pil-Ryung Cha, Jung-Hae Choi and Seung-Cheol Lee,  poster, "Towards a Stable Rare-earth Free Permanent Magnet: The stability of Fe16N2," ESCW2018, 2018.6.21~22, KIAS, Korea. 

144 . Gyuseung Han, Mahesh Chandran, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Prediction for the phase diagram of Ga(As,Sb) solid solution using cluster expansion,"  poster, ESCW2018, 2018.6.21~22, KIAS, Korea.

143 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Equilibrium crystal shape of GaAs and InAs by ab-initio thermodynamics,"  poster, ESCW2018, 2018.6.21~22, KIAS, Korea.

142 . Liu Kai, Eunjung Ko, Cheol Seong Hwang, and Jung-Hae Choi, "Oxygen adsorption on Ge [001] nanowire,"  poster, ESCW2018, 2018.6.21~22, KIAS, Korea. 

141 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Intrinsic electric polarization and its switching mechanism in 2D transition metal dichalcogenides having polar symmetry,"  poster, ESCW2018, 2018.6.21~22, KIAS, Korea. 

140 . Eunjung Ko, Jaehong Park and Jung-Hae Choi, "First-principles tunneling properties of Ge/high-k oxide/Au in comparison with Si/high-k oxide/Au,"  oral, 2018 Korean Physical Society Spring Meeting, 25-27, Apr. 2018, Daejeon Convention Center, Korea.

139 . Gyuseung Han, In Won Yeu, Mahesh Chandran, seung Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Prediction of the atomic configuration and electronic properties of Ga(As,Sb) solid solution using cluster expansion method,"  oral, The 25th Korean Conference on Semiconductors (KCS 2018), 5-7, Feb. 2018, 하이원리조트, Korea.

138 . In Won Yeu, Gyuseung Han, Cheol Seong Hwang, and Jung-Hae Choi, "Surface reconstruction and equilibrium shape of Ⅲ-Ⅴ compound semiconductors as a function of pressure and temperature by ab-initio thermodynamics,"  oral, The 25th Korean Conference on Semiconductors (KCS 2018), 5-7, Feb. 2018, 하이원리조트, Korea.

137 . Liu Kai, Eunjung Ko, Cheol Seong Hwang, and Jung-Hae Choi, "Atomic structure and electronic properties of Ge nanowires along [100], [110] and [111] directions; Density Functional Study,"  oral, The 25th Korean Conference on Semiconductors (KCS 2018), 5-7, Feb. 2018, 하이원리조트, Korea.

136 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Layer-index and valley-index of electrons in 2D transition metal dichalcogenides for optoelectronic applications: 3R MoS2,"  oral, The 25th Korean Conference on Semiconductors (KCS 2018), 5-7, Feb. 2018, 하이원리조트, Korea.

135 . Eunjung Ko, Liu Kai and Jung-Hae Choi, "Quantum-tunneling through the nanometer-scale oxide in Ge/GeO2/Ge and Si/SiO2/Si structures from first-principles ,"  oral, The Korean Ceramic Society Fall Meeting, 2017.10.11~13, COEX, Korea. 

134 . Krishnamohan Thekkepat, Mahesh Chandran, Jung-Hae Choi, and Seung-Cheol Lee, "Effect of Strain on the Electronic Properties of III-V Semiconductors: A First-principles Study," ESCW2017, 2017.6.15~16, KIAS, Korea.

133 . Gyuseung Han, Mahesh Chandran, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Atomic configuration and electronic structures of Ga(As,Sb) solid solution using cluster expansion method,"  ESCW2017, 2017.6.15~16, KIAS, Korea.

132 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Surface morphology of InAs considering entropy effects," ESCW2017, 2015.6.15~16, KIAS, Korea. 

131 . Liu Kai, Eunjung Ko, Cheol Seong Hwang, and Jung-Hae Choi, "Electronic properties for Ge/high-K La2O3 interface structure," ESCW2017, 2017.6.15~16, KIAS, Korea.

130 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Stacking-dependent electric polarization and optical transitions of K valley states in MoS2," ESCW2017, 2017.6.15~16, KIAS, Korea. 

129 . Eunjung Ko, Liu Kai and Jung-Hae Choi, "Tunneling properties through the nanometer-scale oxide in Ge- and Si-based structures," ESCW2017, 2015.6.15~16, KIAS, Korea. 

128 . Eunjung Ko, Liu Kai and Jung-Hae Choi, "First-principles tunneling property in Ge/a-GeO2/Ge," 2017 KPS Spring Meeting, 19-21, Apr. 2017, Daejeon Convention Center, Korea.

127 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "DFT study on the clean-up mechanism of InGaAs(001) native oxides in atomic layer deposition,"  The 24th Korean Conference on Semiconductors (KCS 2017), 13-15, Feb. 2017, 대명비발디파크, Korea.

126 . Liu Kai, Eunjung Ko, Cheol Seong Hwang, and Jung-Hae Choi, "Interfacial properties of Ge (111)/La2O3 by Density Functional Calculations," The 24th Korean Conference on Semiconductors (KCS 2017), 13-15, Feb. 2017, 대명비발디파크, Korea.

125 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Ab initio study on the atomic and electronic structures of MoS2/oxide interface," The  24th Korean Conference on Semiconductors (KCS 2017), 13-15, Feb. 2017, 대명비발디파크, Korea.

124 . Eunjung Ko, Liu Kai and Jung-Hae Choi, "Tunneling current density in Ge/GeO2/Ge structures from first-principles," The  24th Korean Conference on Semiconductors (KCS 2017), 13-15, Feb. 2017, 대명비발디파크, Korea.

123 . Eunjung Ko, Liu Kai and Jung-Hae Choi, "Tunneling properties in Ge(100)/GeO2/Ge(100) and Si(100)/SiO2/Si(100) from first-principles," The Korean Ceramic Society Fall Meeting, 2016.11.23~25, 서울 COEX. 

122 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Optical control of the layer-index of electrons in polar-stacked MoS2," The Korean Ceramic Society Fall Meeting, 2016.11.23~25, 서울 COEX. 

121 . Jung-Hae Choi, In Won Yeu, Gyuseung Han, Krishnamohan Thekkepat, Mahesh Chandran, Seung-Cheol Lee, Cheol Seong Hwang, "Surface, adsorption/desorption and solid solution of III-V compound semiconductors; First principle studies," 한국세라믹학회 추계학술대회, 2016.11.23~25, 서울 COEX. (Invited)

120 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Oxygen Adsorption Behavior of InAs Nanowire by Ab-initio Calculations," IUMRS-ICEM2016, 2016.7.4~7.8, Suntec City, Singapore.

119 . Jung-Hae Choi, "MIDAS (Materials Informatics Database for Advanced Search) as a platform for the materials informatics," The Korean Institute of Metals and Materials Spring Meeting , 2016.4.27~29, 경주화백컨벤션센터, Korea. (Invited)

118 . Dong Gun Kim, Jae-Ho Lee, Hyun Jae Lee, Jung-Hae Choi, and Cheol Seong Hwang, "Investigation of passivation layer effect on Ge substrate using SiO2/Al2O3 bi-layer grown via Atomic Layer Deposition," The 23rd Korean Conference on Semiconductors (KCS 2016), 22-24, Feb. 2016, High1 resort, Korea.

117 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Ab-initio Study on the Effects of Doping in Mono and Bilayer MoS2" The 23rd Korean Conference on Semiconductors (KCS 2016), 22-24, Feb. 2016, High1 resort, Korea.

116 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Oxidation Study on the (100), (110) and (111) Surfaces of InAs by ab-initio Calculations" The 23rd Korean Conference on Semiconductors (KCS 2016), 22-24, Feb. 2016, High1 resort, Korea.

115 . Liu Kai, Cheol Seong Hwang, and Jung-Hae Choi, “Ab-initio Study on The Passivation of Ge/GeO2 Interface by Density Functional Calculations," The 23rd Korean Conference on Semiconductors (KCS 2016), 22-24, Feb. 2016, High1 resort, Korea.

114 . 이광엽, 김진연, 문선영, 백승협, Jung-Hae Choi, 김도향, 장혜정, "Direct imaging of atomic reconstruction at the LaAlO3/SrTiO3 heterostructure oxide interface using STEM," The Korean Ceramic Society Fall Meeting, 2015.11.04~06, 송도 컨벤시아.

113 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Reconstruction structure of InAs surfaces and their effects on electronic structure," Psi-K 2015, 2015.9.6~10, Donostia/San Sebastian, Spain.

112 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Effects of the layer stacking on the electronic, phononic band structures and electron-phonon interactions in MoS2,"  Psi-K 2015, 2015.9.6~10, Donostia/San Sebastian, Spain.

111 . Liu Kai, Cheol Seong Hwang, and Jung-Hae Choi, “Structural and electronic characteristics on Ge/GeO2 interface," Psi-K 2015, 2015.9.6~10, Donostia/San Sebastian, Spain.

110  박재현, 박기철, 최정혜, 황도경, 송용원, "감마알루미나 기판 상에서의 그래핀 성장 및 성장 메커니즘 연구," 한국전기전자재료학회 (KIEEME) 하계학술대회, 2015.6.24~26, 하이원리조트. 

109 . Hee-Soo Hwang, Jin Ha Hwang, and Jung-Hae Choi, "Effects of defect association on the electronic structures in N-doped SnO2," ESCW2015, 2015.6.18~19, KIAS, Korea.

108 . In Won Yeu, Cheol Seong Hwang, and Jung-Hae Choi, "Surface structure and surface energies of InAs," ESCW2015, 2015.6.18~19, KIAS, Korea. 

107 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, "Effects of the polytypism on the electronic, phononic band structures of ultrathin MoS2," ESCW2015, 2015.6.18~19, KIAS, Korea.. 

106 . Liu Kai, Cheol Seong Hwang, and Jung-Hae Choi, “Study on the atomic bonding property and electronic characteristic of amorphous GeO2,” ESCW2015, 2015.6.18~19, KIAS, Korea. 

105 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, “Effect of Stacking Sequence on the Electronic Properties of Layered MoS2: Polytypism and Heterostructure," The 22nd Korean Conference on Semiconductors (KCS 2015), 10-12, Feb. 2015, Songdo, Korea.

104 . Liu Kai, Cheol Seong Hwang, and Jung-Hae Choi, "Effects of Oxygen Adatoms on the Atomic and Electronic Structures of Various Ge Surfaces by Ab-Initio Study" The 22nd Korean Conference on Semiconductors (KCS 2015), 10-12, Feb. 2015, Songdo, Korea.

103 . Heesu Hwang, Jung-Hae Choi, and Jin-Ha Hwang, "Structural and electronic properties of SnO and SnO2  and convergence of supercell for point defects calculation, "The 48th Winter Annual Conference of the Korean Vacuum Society, 9-11, Feb, 2015, Korea.

102 . Jong Kwon Choi, Joohwi Lee, Seung-Hyub Baek, Sun Young Moon, Jaehong Park, Jung-Hae Choi, Hye Jung Chang, "Atomic scale analysis of interface of oxide heterostructure using Cs-corrected STEM, "International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2014), 16-19, Nov, 2014, Jeju, Korea.

101 . Liu Kai, Cheol Seong Hwang, and Jung-Hae Choi, “Ab-initio Study on the Effects of Oxygen Adatoms on Ge Surfaces,” (Ab-initio study on the surface structures, surface energies and the electronic structures of Ge (100), (110) and (111) surfaces," Asian17 (The 17th Asian Workshop on First-Principle Electronic Structure Calculations), 2014. 11. 2~5.Yonsei Univ, Seoul, Korea. 

100 . Jaehong Park, Cheol Seong Hwang, and Jung-Hae Choi, “Ab-initio Study on the Interface Structure of a-ZnSnO3/a-SiO2,” Asian17 (The 17th Asian Workshop on First-Principle Electronic Structure Calculations) Yonsei Univ, Seoul, Korea, 2014. 11. 2~5, 

99 . Jung-Hae Choi, “MIDAS; Materials Informatics Database for Advanced Search,” AMDS2014 (The 4th Asian Materials Data Symposium), 2014.10.29~11.1, Hyatt Regency Jeju, Korea. (Invited) 

98 . Jong Kwon Choi, Joohwi Lee, Seung-Hyub Baek, Sun Young Moon, JingSang Kim, Jaehong Park, Cheol Seong Hwang, Jung-Hae Choi, Hye Jung Chang," Lattice expansion and polarization induced by dipole at LaAlO3 (or CaTiO3)/SrTiO3 interfaces," 18th International Microscopy Congress, Czech, 7-12, Sep, 2014, 

97 . Joohwi Lee, Deok-Yong Cho, Jisim Jung, Un Ki Kim, Sang-Ho Rha, Cheol Seong Hwang, and Jung-Hae Choi, “Ab-initio study on the atomic structure, electronic structure and thermodynamic stability of crystalline and amorphous zinc tin oxides,” Electroceramics XIV, 2014.6. 16-20, Bucharest, Romania. 

96 . Joohwi Lee and Jung-Hae Choi*, Deok-Yong Cho, Jisim Jung, Un Ki Kim, Sang-Ho Rha, and Cheol Seong Hwang, “Atomic and Electronic Structures of Various Phases of Zinc Tin Oxides by Ab-initio Calculations,” CIMTEC2014, 6th Forum on New Materials, 2014.6.15-20, Montecatini Terme, Italy.

95 . Joohwi Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Comparison on the atomic and electronic structures of crystalline and amorphous Zn2SnO4 using density functional theory," 2014.5.8~10, AMTC4 (4th International Symposium on Advanced Microscopy and Theoretical Calculations), Hamamatsu, Japan. 

94 . Joohwi Lee, Seung-Cheol Lee,Cheol Seong Hwang,and Jung-Hae Choi, "Structural Characteristics of the Various Phases of Zinc Tin Oxides by First-principles Calculations," 16th Asian Workshop on First-Principles Electronic Structure Calculations, 2013.10.27~30, Beijing 

93 . Jung-Hae Choi, 심재혁, 박재홍, 홍성완, 안민기, 황철성, “SiC 재료에 대한 열역학계산 및 원자단위 계산과학 연구,” The Korean Ceramic Society Fall Meeting, 2013.10.16~18, 제주 ICC. [SiC반도체 재료와 소자] 심포지움 (Invited)

92 . Joohwi Lee, Deok-Yong Cho, Un Ki Kim, Youngho Kang, Seungwu Han, Cheol Seong Hwang, Seung-Cheol Lee and Jung-Hae Choi, “Ab-initio and experimental studies on the atomic and electronic structure of amorphous ZnSnO3,” ESCW2013, 2013.6.20~21, KIAS, Korea. 

91 . Jung-Hae Choi, “SiC 재료에 대한 계산과학적 연구방법론 소개,” 한국 반도체 디스플레이 기술학회 춘계학술대회 및 제1회 SiC 전력반도체 심포지움, 2013.5.31, 서울 한국교원단체총연합회관 (Invited)

90 . Joohwi Lee, Youngho Kang, Seung-Cheol Lee, Seungwu Han, Cheol Seong Hwang and Jung-Hae Choi, "Structural characteristics of amorphous zinc tin oxides by first-principles calculations,” 8th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-8), 2013.5.13~15, Waseda Univ. Tokyo, Japan.

89 . Nayoung Park Jung-Hae Choi, and Seung-Cheol Lee,  “Fe-TiMeC ,” The Korean Institute of Metals and Materials Spring Meeting, 2013.4.25~26, Jeju, Korea.

88 . Jungho Shin, Jung-Hae Choi, and Seung-Cheol Lee, “Core-shell ORR AE; Overpotential,” The Korean Institute of Metals and Materials Spring Meeting, 2013.4.25~26, Jeju, Korea. 

87 . Joohwi Lee, Seung-Cheol Lee and Cheol Seong Hwang, and Jung-Hae Choi, “Ab-initio thermodynamics on the various zinc tin oxides,” 15th Asian Workshop on First-Principles Electronic Structure Calculations, 2012.11.5~7, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei. 

86 . Joohwi Lee, Seung-Cheol Lee and Cheol Seong Hwang and Jung-Hae Choi, “Point Defects in Inverse Spinel Zinc Tin Oxide Using DFT+U and Screened Hybrid Functional Approach,” IUMRS-ICEM 2012, 2012.9.23~28, Yokohama, Japan .

85 . Jung Soo Oh, Ho-Seok Nam, Jung-Hae Choi, and Seung-Cheol Lee, "Prediction of atomic arrangement of Pt-Cu nanoalloy by genetic algorithm," International Conference on Mathematical Modeling in Physical Sciences, 2012.9.3~7, Budapest, Hungary. 

84 . Rizcky Tamarany First-principles study on faceting of MgO(111) for CO2 stabilization,” ESCW2012, 2012.6.21~22, KIAS, Korea. 

83 . Jungho Shin, “Catalytic activity of core-shell nanocluster based on platinum in PEMFC: all-electron DFT study,” ESCW2012, 2012.6.21~22, KIAS, Korea.

82 . Joohwi Lee, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, “ Effects of pressure and temperature on various zinc tin oxide phases using ab-initio thermodynamics, “ ESCW2012, 2012.6.21~22, KIAS, Korea. 

81 . Yoonsoo Jung, Sae-Jin Kim, Kyoung-Jin Choi, Seung-Cheol Lee, Cheol Seong Hwang and Jung-Hae Choi, “Effects of film thickness on phase transition of epitaxial SrRuO3 thin film on SrTiO3 substrates,” ESCW2012, 2012.6.21~22, KIAS, Korea. 

80 . Joohwi Lee, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, “제일원리 계산을 이용한 산화아연주석의 점결함 형성 및 이동에 관한 연구,” 대한금속ㆍ재료학회 춘계학술대회, 2012.4.26~27, 현대성우리조트. 

79 . Rizcky Tamarany, Jung-Hae Choi, and Seung-Cheol Lee, “Effects of Transition Metal Dopant for CO Stability on MgO Surfaces,” The Korean Institute of Metals and Materials Spring Meeting, 2012.4.26~27, 현대성우리조트. 

78 . Jungho Shin, Jung-Hae Choi, and Seung-Cheol Lee, “Catalytic Activity of Core-shell Nanocluster Based on Platinum in PEMFC : all-electron DFT Study,” The Korean Institute of Metals and Materials Spring Meeting, 2012.4.26~27, 현대성우리조트. 

77 . Jung Soo Oh, Ho-Seok Nam, Jung-Hae Choi, and Seung-Cheol Lee, “유전알고리듬을 이용한 Pt-Cu 나노합금의 구조 예측,” The Korean Institute of Metals and Materials Spring Meeting, 2012.4.26~27, 현대성우리조트. 

76 . Yoonsoo Jung, Sae-Jin Kim, Kyoung-Jin Choi, Seung-Cheol Lee, Cheol Seong Hwang and Jung-Hae Choi,, “Ab-initio study on the effects of film thickness on the phase transition of epitaxial SrRuO3 thin film on SrTiO3 substrates; 제일원리 계산을 이용한 SrTiO3 기판 위의 Epitaxial SrRuO3박막의 두께에 따른 상전이 연구,” The Korean Institute of Metals and Materials Spring Meeting, 2012.4.26~27, 현대성우리조트.  (Excellent Poster Award)

75 . Jungho Shin, Seung-Cheol Lee, and Jung-Hae Choi, “Adsorption energies and reactivity of Pt55 nanoparticles for fuel cell application,” ” International Conference on Advanced Electromaterials, (ICAE2011), 2011.11.7~10, Jeju, Korea 

74 . Rizcky Tamarany, Seung-Cheol Lee, and Jung-Hae Choi, “Mechanism and stability of methane production from CO2 and H2 on MgO surface: A theoretical study by DFT calculations,” International Conference on Advanced Electromaterials, (ICAE2011), 2011.11.7~10, Jeju, Korea

73 . Joohwi Lee, Seung-Cheol Lee and Cheol Seong Hwang and Jung-Hae Choi, “Structural, electronic, and thermodynamic properties of inverse spinel phase Zn2SnO4,” ai-WISE - Modern developments in the ab initio description of charged systems for semiconductors and electrochemistry, 2011.10.23~26. Ringberg Castle, Tegernsee, Germany. 

72 . Nayoung Park, Jung-Hae Choi, Seung-Cheol Lee, Pil-Ryung Cha, “First-principles study of the energetics and electronic structure of interfaces between bcc Fe and transition,” NanoKorea-2011, 2011.8.24~26, KINTEX. 

71 . June Gunn Lee, Jung-Hae Choi, and Seung-Cheol Lee, “Pt(111)/Ru(0001) Bimetal System under Compressive Strain for Adsorption and Diffusion of Atomic Oxygen,” NanoKorea-2011, 2011.8.24~26, KINTEX. 

70 . Jungho Shin, Jung-Hae Choi, and Seung-Cheol Lee, “Catalytic activity of core-shell nano-cluster based on platinum for hydrogen oxidation reaction: all-electron DFT,” NanoKorea-2011, 2011.8.24~26, KINTEX. 

69 . Sae-Jin Kim, Seung-Cheol Lee and Jung-Hae Choi, “Density functional calculations on the mechanical properties of N/O doped crystalline Ge2Sb2Te5,” NanoKorea-2011, 2011.8.24~26, KINTEX. 

68 . Rizcky Tamarany, Jung-Hae Choi, and Seung-Cheol Lee, "DFT calculations for early stage deposition of Mg & O atoms on GaAs(001) surface: β2(2x4) reconstruction," ESCW2011, 2011.6.23~24, KIAS, Korea.

67 . Joohwi Lee, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "Ab-initio phonon calculations on the various ZnSnO phases," ESCW2011, 2011.6.23~24, KIAS, Korea.

66 . Jungho Shin, Jung-Hae Choi, and Seung-Cheol Lee, " Adsorption energies of H, O and OH on Pt55 nanoparticle by using all-electron scalar relativistic calculation," ESCW2011, 2011.6.23~24, KIAS, Korea.

65 . Na-Young Park, Jung-Hae Choi, and Seung-Cheol Lee, "First-principles study of the energetics and electronic structure of the Fe/(Ti, Mo)C interfaces," ESCW2011, 2011.6.23~24, KIAS, Korea.

64 . Sae-Jin Kim, Jungho Shin, Seung-Cheol Lee, and Jung-Hae Choi, "Atomic and electronic structures of hexagonal Ge2Sb2Te5 by pseudopotential and all-electron methods," ESCW2011, 2011.6.23~24, KIAS, Korea.

63 . Sae-Jin Kim, Joohwi Lee, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, “Behaviors of nitrogen in crystalline Ge2Sb2Te5," ESCW2011, 2011.6.23~24, KIAS, Korea. (Invited)

62 . Sae-Jin Kim, Joohwi Lee, Seung-Cheol Lee,  Cheol Seong Hwang,  Chan Park, Jung-Hae Choi, Ab-initio calculations on the energy barrier of nitrogen diffusion in hexagonal Ge2Sb2Te5," The Korean Ceramic Society Spring Meeting, 2011.4.21~22, 경기대학교.

61 . Joohwi Lee, Seung-Cheol Lee, Cheol Seong Hwang, and Jung-Hae Choi, "포논 계산을 적용한 제일원리 계산을 통한 다양한 ZnSnO 상에 대한 연구(First-principles Phonon Calculations on the Various Zinc Tin Oxide Phases)," The Korean Ceramic Society Spring Meeting, 2011.4.21~22, 경기대학교.

60 . 박나영, 이승철, 차필령, Jung-Hae Choi, "Effect of Grain Boundaries and Grain Size on Primary Radiation Damage in Nano-Crystal Iron : A Molecular Dynamics Study," The Korean Institute of Metals and Materials Spring Meeting 

, 2011.4.21~22, 대구컨벤션센터.

59 . Jungho Shin, Jung-Hae Choi, and Seung-Cheol Lee, "제일원리 전자구조기법을 통한 백금나노입자 표면에서 H, O 및 OH 의 흡착에 대한 반응성 해석." 대한금속재료학회 춘계학술대회, 2011.4.21~22, 대구컨벤션센터.

58 . 오정수, 남호석, Jung-Hae Choi, 이승철, "유전알고리듬을 이용한 이원계 Pt 나노합금의 구조 예측," The Korean Institute of Metals and Materials Spring Meeting, 2011.4.21~22, 대구컨벤션센터.

57 . Jung-Hae Choi, 김세진, 이주휘, 이승철, 정병기, 박찬, “상변화 재료에서의 첨가제에 대한 제일원리계산 (First-principle studies on dopants in phase change materials),” The Korean Ceramic Society Fall Meeting, 2010.10.21 ~ 23, 제주컨벤션센터. (Invited)

56 .  Seung-Cheol Lee, June-Gunn Lee and Jung-Hae Choi, “Stability of Pt atom on metal surface under compressive strain and thickness effect of Pt on Ru(0001) surface on O adsorption,” Psi-K-2010, 2010.-9.12 ~ 16, Berlin, Germany. 

55 . Rizcky Tamarany, Seung-Cheol Lee, and Jung-Hae Choi, "Energetics of Mg and O atoms on As-terminated GaAs(001) surface,” Psi-K-2010, 2010-9.12 ~ 16, Berlin, Germany. 

54 . Jungho Shin, Seung-Cheol Lee1 and Jung-Hae Choi, “Site preference of H atoms on Pt nanoparticle by using full-potential relativistic method,” Psi-K-2010, 2010.9.12 ~ 16, Berlin, Germany. 

53 . Na-Young Park, Woo-Sang Jung, Jung-Hae Choi, Pil-Ryung Cha, and Seung-Cheol Lee, “First-principles study on the interfacial energy between bcc Fe and transition metal carbides,” Psi-K-2010, 2010.9.12 ~ 16, Berlin, Germany. 

52 .  Joohwi Lee, Kwang Duk Na, Jung-Hae Choi, Seung-Cheol Lee, Tomofumi Tada, Satoshi Watanabe, Cheol Seong Hwang, “Formation and migration of a vacancy in Ge under biaxial compressive strain by first-principles calculations,” Psi-K-2010, 2010.9.12 ~ 16, Berlin, Germany.  

51 . Sae-Jin Kim, Jung-Hae Choi, Seung-Cheol Lee, Byung-ki Cheong, Chan Park, “Energetics of hexagonal Ge2Sb2Te5 doped with nitrogen or oxygen by ab-initio calculations,” Psi-K-2010, 2010.9.12 ~ 16, Berlin, Germany. 

50 . Jinhyun Shin, Astini Vita, Sari Windu, Jung-Hae Choi, Seung-Cheol Lee, and June Gunn Lee, “Energetics of Cu on Ru(0001): Density Functional Calculations,” 2010.8.17 ~ 20, KINTEX, Seoul, Korea. 

49 . 신정호, 이현주, Jung-Hae Choi,이승철, “제일원리 전자구조기법을 통한 백금 나노입자의 반응성 해석,” The Korean Institute of Metals and Materials Spring Meeting , 2010.4.22 ~ 23, 현대성우리조트. 

48 . 오정수, 박나영, 정환원, Jung-Hae Choi, 이승철, “이원계 나노합금 구조 연구를 위한 유전알고리듬의 응용 (The genetic algorithm for the optimization of the structure of bimetallic nanoalloy),” The Korean Institute of Metals and Materials Spring Meeting , 2010.4.22 ~ 23, 현대성우리조트. 

47 . 이주휘, 최정혜, 이승철, 황철성, “제일원리 계산을 이용한 변형된 Ge에서의 공공의 형성과 이동에 대한 연구 (First-principles calculations on the formation and migration of the vacancy in strained Ge),” The Korean Institute of Metals and Materials Spring Meeting , 2010.4.22 ~ 23, 현대성우리조트.

46 . 김세진, 최정혜, 이승철, 정병기, 박 찬, “제일원리 계산을 이용한 육방구조의 Ge2Sb2Te5 에서 질소와 산소의 안정성 연구 (Stability of nitrogen and oxygen in the hexagonal Ge2Sb2Te5 by ab-initio calculations),” The Korean Institute of Metals and Materials Spring Meeting , 2010.4.22 ~ 23, 현대성우리조트. 

45 . 오정수, 정환원, 이승철, 최정혜, 이규환, “유전알고리듬을 이용한 이원계 나노합금 구조 예측 기법,” The Korean Institute of Metals and Materials Spring Meeting, 2009.10.22 ~ 23, 대구컨벤션센터(EXCO). 

44 . 이승철, 최정혜, 정우상, Bernard Eck, Richard Dronskowski, “COHP방법을 이용한 재료의 화학결합 해석,” The Korean Institute of Metals and Materials Spring Meeting , 2009.10.22 ~ 23, 대구컨벤션센터(EXCO). 

43 . 최정혜, 나광덕, 이승철, 황철성, “제일원리 계산법을 이용한 Ge 공공 형성에 미치는 이축 변형의 방향 및 크기 효과 (Effects of direction and magnitude of the biaxial strain on the vacancy formation in Ge by using Ab-initio calculations),” 한국세라믹학회 추계학술대회, 2008.10.19 ~ 20, 대전 컨벤션 센터. 

42 . 김세진, 최정혜, 이승철, 정병기, 박찬, “제일원리 계산을 이용한 육방구조의 Ge2Sb2Te5에서 질소의 안정성 연구 (Stability of nitrogen in the hexagonal Ge2Sb2Te5 by ab-initio calculations) 한국세라믹학회 추계학술대회, 2008.10.19 ~ 20, 대전 컨벤션 센터. 

41 . Jung-Hae Choi, , Kwang-Duk Na, Seung-Cheol Lee, and Cheol Seong Hwang, “First-principles study on the vacancy formation in Ge under biaxial compressive strain,” ICMAP 2009 (2nd International conference on Microelectronics and Plasma Technology), 2009.9.22 ~ 2009.9.25, BEXCO Convention Center, Busan, Korea. 

40 . Hye-Jin Jung, Jung-Hae choi, Seung-Cheol Lee, Jae Min Kwon, Jin-Yong Kim, “Status of Multi-scale Simulation on Fusion Materials,” KSIAM, 2009.5.29 ~ 30 Seoul National Univ. 

39 . T.-E. Kim, Y.-S. Lee, W.-S. Jung, S.-H. Chung, J.-H. Shim, J.-H. Choi, and S.-C. Lee, “Ground state structure and interfacial energy of (Ti1-x,Mox)C,” MMM2008 (Multiscale Materials Modeling), 2008.10.26 ~ 2008.10.31, Tallahassee, FL, USA. (original title in program book ; Electronic and Bonding Characteristics of (Ti,Mo)C) 

38 . 김세진, 최정혜, 이승철, 이광렬, 박찬, “분자동역학을 사용한 온도와 입자간 각도에 따른 SiO2 미세구조 연구,” 대한금속재료학회 추계학술대회, 2008.10.23 ~ 24, 송도컨벤시아. 

37 . 이승철, 최정혜, 이영수, 심재혁, 김동익, Erik Fluery, “제일원리법을 사용한 FCC-Fe기지내 구리와 공공의 에너제틱스 연구,” 대한금속재료학회 추계학술대회, 2008.10.23 ~ 24, 송도컨벤시아. 

36 . 나광덕, 최정혜, 이승철, 황철성, “2차원 압축변형의 방향 및 크기에 따른 Ge 공공 형성에 관한 제일원리계산,” 대한금속재료학회 추계학술대회, 2008.10.23 ~ 24, 송도컨벤시아. (PS-235)

35 . 김태은, 이영수, 정순효, 최정혜, 정우상, 이승철, “(Ti1-x,Mox)C 탄화물의 농도에 따른 기저상태 원자구조 및 BCC Fe와의 계면에너지,” 대한금속재료학회 추계학술대회, 2008.10.23 ~ 24, 송도컨벤시아. 

34 . 최정혜, 나광덕, 이승철, 이광렬, 황철성, “제일원리계산을 이용한 2차원 압축변형 하의 Ge 공공 형성에 관한 연구,” 대한금속재료학회 추계학술대회, 2008.10.23 ~ 24, 송도컨벤시아. 

33 . Seung-Cheol Lee, Elena Kim, Tae-Eun Kim, Jung-Hae Choi, and Seung-woo Han, “Effects of Strain on the Distribution of Transition Metal Impurities in GaN Host: First Principles Calculation,” ISPSA 2008 (14th International Symposium on the Physics of Semiconductors and Applications), (http://ispsa2008.or.kr) 2008.8.26 ~29, Ramada Plaza Jeju Hotel, Jeju, Korea. 

32 . Jung-Hae Choi, Pil-Ryung Cha, Seung-Cheol Lee, Jung Soo Oh, Kwang-Ryeol Lee, “Behavior of Si(100) vicinal surface at elevated temperatures by using Tersoff potential,” ICMAP 2008 (1st International Conference on Microelectronics and Plasma Technology), 2008.8.18 ~ 20 Ramada Plaza Jeju Hotel, Jeju, Korea. 

31 . Tae-Eun Kim, Seung-Cheol Lee, Jung-Hae Choi, and Seung-Woo Han, “Effect of Strain on the Distribution of Transition Metal Elements in GaN,” IUMRS-ICEM (International conference on Electronic Materials) 2008, 2008.7.28 ~ 8.1, Sydney, Australia. 

30 . Jung-Hae Choi, Kwang-Duk Na, Cheol Seong Hwang, Seung-Cheol Lee, and Kwang-Ryeol Lee, “First-principles Study on Vacancy in Ge under Biaxial Strain,” IUMRS-ICEM (International conference on Electronic Materials) 2008, 2008.7.28 ~ 8.1, Sydney, Australia. 

29 . 정혜진 오상준, 이승철, 최정혜, “핵융합 재료 손상에 대한 Multiscale Modeling 연구 동향,” 대한금속재료학회 춘계학술대회, 2008.4.24 ~ 25, 대전컨벤션센터

28 . 김세진, 김상필, 최정혜, 이승철, 이광렬, 김도연, S. Plimpton, “Fixed charge problem of modified-BMH potential during molecular dynamic simulation of Si/SiO2 interface,” 제34회 동계 진공학회, 2008.2.14, 단국대학교 죽전캠퍼스

27 . Jung-Hae Choi, Seung-Cheol Lee, and Kwang-Ryeol Lee, “First-principles Investigations on Vacancy of Ge in Strained Condition,” The 4th Conference of the Asian Consortium on Computational Materials Science (ACCMS-4), 2007.9.12 ~ 16, KIST.

26 . 최정혜, 이승철, 이광렬, “제일원리계산에 의한 Ge 공공 형성에 관한 변형 효과 고찰 (Effect of strain on the vacancy formation of Ge: First-principles approach),” 대한금속재료학회 전산재료과학분과 심포지엄, 2007.8.16, 연세대학교.

25 . 이승철, 심재혁, 최정혜, 이광렬, “핵융합로용 소재개발을 위한 전산모사 연구현황 (State-of the-art of computational materials science for developing fusion materials),” 대한금속재료학회 전산재료과학분과 심포지엄, 2007.8.16, 연세대학교.

24 . Jung-Hae Choi, Seung-Cheol Lee, and Kwang-Ryeol Lee, “First-principle Study on Intrinsic Defects of Ge in Strained Condition,” International Conference On Materials for Advanced Technologies (ICMAT) 2007, 2007.7.1 ~7.6, Singapore.

23 . Heon Woong Choi, Jung-Hae Choi, Jae-Pyoung Ahn, Kwang-Ryeol Lee and Kyu Hwan Oh, “Structure and Mechanical Properties of Ag-Incorporated DLC Films Prepared by a Hybrid Ion Beam Deposition System,” The International Conference On Metallurgical Coatings And Thin films (ICMCTF) 2007, 2007.4.23 ~4.27, San Diego, U. S. A.

22 . 최정혜, 이승철, 이광렬. "제일원리계산에 의한 금속이 혼입된 DLC 박막의 결합특성 고찰,” 대한금속재료학회 2006년도 추계학술대회 전산재료과학분과, 2006.10.26 ~ 10.27, 제주국제컨벤션센터. 

21 . H. W. Choi, J. -H. Choi, K. -R. Lee, K. H. Oh, "Surface and Biological Properties of Ag-incorporated DLC Films Prepared by a Hybrid Ion Beam Deposition System,” The 6th Korea-Japan Symposium on Plasma and Thin Film Technology, 2006.10.20 ~ 10.21, Busan, Korea.

20 . Jung-Hae Choi, Seung-Cheol Lee, and Kwang-Ryeol Lee, “First-Principles Study on Stress Reduction Behavior of Metal-Incorporated Amorphous Carbon Films,” IUMRS-ICA-2006, 2006.9.10 ~ 9.14. 제주 신라호텔. 

19 . 최정혜, 안효신, 이승철, 이광렬. "금속이 혼입된 DLC 박막의 응력 감소 거동 : 제일원리계산,” 30회 대한진공학회, 2006.2.16 ~ 2.17, 광운대학교. 

18 . 최정혜, 안효신, 왕애영, 이광렬. "금속이 혼입된 비정질 탄소막에서의 응력 감소 거동 ; 실험적 분석과 제일원리계산,"? 2005 대한금속.재료학회 열역학분과 심포지엄, 2005.9.23 ~ 9.24, 대전 KAIST. 

17 . Jung-Hae Choi, Hyo-Shin Ahn, Seung-Cheol Lee, and Kwang-Ryeol Lee, “Stress Reduction Behavior in Metal-Incorporated Amorphous Carbon Films; ; First-Principle Approach,” ACCMS-3 (Third Conference of the Asian Consortium for Computational Materials Science) 2005.9.8 ~ 9.11, IOP, CAS, Beijing, China.???? 

16 . C. S. Hwang, W. Y. Park, D. S. Jeong, and J.-H. Choi, “Temperature and thickness dependent dielectric propertiees of (Ba,Sr)TiO3 thin films capacitors with Pt or IrO2 electrodes,” ElectroCeramics IX, 2004.5.31 ~6.3, Cherbourg, France. 

15 . J.-H. Choi, D.-Y. Park, H.-J. Kim, D.-S. Lee, D.-Y. Kim, C. S. Hwang. and J Ha, “Characterization of Preferred Orientation Controlled Giant Grain Growth Behavior of Platimun Films on Silicon and Sapphire Substrates by Reactive Magnetron Sputtering,” ElectroCeramics IX, 2004.5.31 ~6.3, Cherbourg, France. 

14 . D.-Y. Park, J.-H. Choi, H.-J. Kim, D.-S. Lee, S. H. Kim, S. W. Lee and C. S. Hwang, “Orientation control and characterization of giant grains of reactively sputtered platinum films on silicon and sapphire substrates,” ISIF, 2004. 4.5~9, 경주 

13 . 정영수, 최정혜, 이종흔, 이제훈, 김도연, "CaO.2SiO2 또는 SiO2 을 적하한 8 mol% 이트리아 안정화 지르코니아에서의 계면상 분포: 임피던스 측정에 의한 평가: Intergranular-Phase Distribution in CaO.2SiO2- or SiO2-dropped 8 mol%-Yttria-Stabilized Zirconia: Impedance Spectroscopic Estimation," 2003년도 한국 세라믹학회 추계총회, 2003.10.17 ～ 10.18, 대전 배재대학교. 

12 . Y.-S. Jung, J.-H. Choi, J.-H. Lee, J. H. Lee, and D.-Y. Kim, "Impedance Spectroscopic Estimation of Intergranular-Phase Distribution in CaO.2SiO2- or SiO2-dropped 8 mol%-Yttria-Stabilized Zirconia," Solid State Ionics 14, 2003.6.22 ~ 27, Monterey, CA, U.S.A.

11 . 최정혜, 김도연, “나노 구조재료: 입성장의 이해," 나노 구조재료 Workshop, 2001.10.18, 한양대학교 안산 캠퍼스. 

10 . 최정혜, 김도연, “계면에너지 이방성이 Sapphire 평형 형상에 미치는 영향;Effect of Surface Energy Anisotropy on the Equilibrium Shape of Sapphire,” 2000년도 한국 세라믹학회 추계총회, 2000.10.20 ～ 10.21, 춘천 강원대학교. 

9 . J.-H. Choi, N. M. Hwang, and D.-Y. Kim, "Effect of Bi2O3 Addition on the Sintering of ZnO: Approach by Interface Structure," 102nd Annual Meeting & Exposition of Am. Ceram. Soc. Meeting, 2000.4.30 ～ 5.3, St. Louis, MO, U.S.A. 

8 . 최정혜, 이범석, 황농문, 김도연, “Bi2O3  첨가가 ZnO 소결에 미치는 영향: 계면구조적 고찰;Effect of Bi2O3  Addition on the Sintering of ZnO: Approach by Grain Boundary Structure" 1999년도 한국 세라믹학회 추계총회, 1999.10.22 ～ 10.23, 나주 동신대학교. 

7 . 최정혜, 김도연, "Ruby 내 고립 기공의 평형 형상;The Equilibrium Cavities in Ruby,“ 1997년도 한국 요업학회 추계총회, 1997.10.24 ～ 10.25, 고려대학교. 

6 . C. A. Handwerker, J. E. Blendell, J. W. Cahn, W. C. Carter, J. Cline, T. Foecke, B. J. Hockey, M. D. Vaudin, J. Wallace, S. M. Wiederhorn, J.-H. Choi, and D.-Y. Kim, "Equilibrium Geometries and Motion of Anisotropic Interfaces," 초청 강연, 1995년도 한국 요업학회 추계총회, 1995.10.20 ～ 10.21, 선문대학교. 

5 . 이태완, 최정혜, 윤의준, 김도연, "저압유기금속화학증착법을 이용한 InP 선택에피성장에서의 비대칭적 성장 양상,“ 1995년도 한국 요업학회 추계총회, 1995.10.20 ～ 10.21, 선문대학교. 

4 . 최정혜, 김도연, "Sapphire 내 고립 기공의 평형 형상,“ 1994년도 한국 요업학회 추계총회, 1994.10.21 ～ 10.22, 연세대학교. 

3 . J.-H. Choi, D.-Y. Kim, B. J. Hockey, S. M. Wiederhorn, C. A. Handwerker, J. E. Blendell, W. C. Craig, and A. R. Roosen, "The Equilibrium Shape of Cavities in Sapphire," 96th Annual Meeting & Exposition of Am. Ceram. Soc. Meeting, 1994.4.24 ～ 4.28, Indianapolis, IN, U.S.A. 

2 . 최정혜, 김도연, "액상 속의 MgO 단결정이 나타내는 고상-액상 계면 불안정성,“ 1992년도 한국 요업학회 추계총회, 1992.10.23 ～ 10.24, 인하대학교. 

1 . 최정혜, 김도연, “Slag 침투에 따른 크롬-마그네시아계 내화벽돌의 미세조직 변화,” 1991년도 한국 요업학회 추계총회, 1991.10.31 ～ 11.1, 서울대학교 신소재공동연구소.