Presentations

• 2025

· [P] W. S. Yun, S. W. Han, J.-S. Kim, and M.-J. Lee, "Novel single-layer CdSbS3 as a promising p-type 2D thermoelectric material" (A20250530-4289), Nov. XX and W. S. Yun, "Thermoelectric performance and stability of novel single-layer HfGeTe4" (A20250530-4294), Nov. XX → "Under consideration", International Conference on Advanced Electromaterials (ICAE 2025), ICC Jeju, Jeju Island, Republic of Korea, November 25-28, 2025. To be scheduled

· [P] W. S. Yun, H.-J. Lee, J.-S. Kim, M.-J. Lee, and S. W. Han, "Novel single-layer CdSbX3 (X = S, Se) as a promising two-dimensional thermoelectric material" (P2-co.202), April 24, 11:30~13:00, The Korean Physical Society, Spring Meeting, Daejeon Convention Center (DCC), Daejeon, Republic of Korea, April 23-25, 2025.

· [P] W. S. Yun, J.-S. Kim, H.-J. Lee, and M.-J. Lee, "Strain-induced Enhancement of Ferromagnetism above Room Temperature in 2D Single-layer MoI2" (P10-07_037), April 02, W. S. Yun, J.-S. Kim, H.-J. Lee, and M.-J. Lee, "Magnetism and Magnetocrystalline Anisotropy of Single-layer Fe5GaTe2" (P10-10_182), April 02, The Korean Sensors Society, Spring Meeting, Science and Technology Convention Center (ST Center), Seoul, Republic of Korea, April 2-3, 2025.

· Participation, The 32th Korean Conference on Semiconductors (KCS), High 1 Resort Grand Hotel Convention Tower, Jeongseon-Gun Gangwon-Do, Republic of Korea, Febuary 12-14, 2025.

• 2024

· Participation, The Korean Magnetics Society, 2024 Winter Conference, Lahan Select Gyeongju, Gyeongju, Republic of Korea, November 27-29, 2024.

· [P] W. S. Yun, S. W. Han, H.-J. Lee, J.-S. Kim, and M.-J. Lee, "Single-layer ZrHfS4 as an excellent 2D thermoelectric material enduring in high temperatures" (Poster-79) Oct. 29 (Tue.) and W. S. Yun, "Electric polarization effect on magnetocrystalline anisotropy of Fe3XTe2/In2Se3 heterostructures (X = Ge and Ga)" (Poster-80) Oct. 29 (Tue.), The 25th Asian Workshop on First-Principles Electronic Structure Calculations (ASIAN-25), University of Ulsan, Haesong Hall, Ulsan, Republic of Korea, October 28-30, 2024.

· [P] W. S. Yun, S. W. Han, H.-J. Lee, J.-S. Kim, and M.-J. Lee, "Magnetocrystalline Anisotropy of Two-Dimensional Magnetic Materials Fe3GeTe2 and Fe3GaTe2" (P2-co.221) Oct. 24 (Thu), The Korean Physical Society, Fall Meeting, Yeosu Expo Convention Center, Yeosu Jeollanamdo, Republic of Korea, October 22-25, 2024. 

· [P] W. S. Yun, J.-S. Kim, H.-J. Lee, M.-J. Lee, and S. W. Han, "Strong Rashba-type splitting in 2D Tl2S/Bi(111) heterostructure and Janus TlBiS monolayer" (P10-09) Sept. 4 (Wed.) and W. S. Yun, J.-S. Kim, H.-J. Lee, and M.-J. Lee, "Magnetism and Magnetocrystalline Anisotropy of 2D Magnetic Materials Fe3XTe2 (X = Ge and Ga)" (P10-10) Sept. 4 (Wed.), The Korean Sensors Society, Fall Meeting, Yeosu The Ocean Resort, Yeosu Jeollanamdo, Republic of Korea, September 04-06, 2024.

· Participation, The 20th KIAS Electronic Structure Calculations Conference, Korea Institute for Advanced Study (KIAS), Seoul, Republic of Korea, July 11-12, 2024.

· [P] W. S. Yun, S. W. Han, and M.-J. Lee, "Excellent thermoelectric perfromance of novel single-layer ZrHfS4" (P2_2D_0176) June 5 (Wed.), The 21st International Symposium on the Physics of Semiconductors and Applications (ISPSA 2024), Ramada Plaza Hotel Jeju, Jeju Island, Republic of Korea, June 02-06, 2024.

· [P] W. S. Yun, J.-S. Kim, H.-J. Lee, and M.-J. Lee, "Exploring Magnetic Sensing Materials with above Room Temperature Ferromagnetism: Two-Dimensional Single-Layer MoI2" (P12-05),  and W. S. Yun, J.-S. Kim, H.-J. Lee, M.-J. Lee, and S. W. Han, "First-principles study of Rashba effect in two-dimensional Tl2S/Bi(111) heterostructure and Janus TlInS monolayer" (P12-10), The Korean Sensors Society, Spring Meeting, Daejeon Convention Center (DCC), Daejeon, Republic of Korea, April 29-30, 2024.

· [P] W. S. Yun, M.-J. Lee, and S. W. Han, "Novel half-Heusler compounds TaRuX (X=pnictogens) as promising thermoelectric materials" (P2-.206), April 25, The Korean Physical Society, Spring Meeting, Daejeon Convention Center (DCC), Daejeon, Republic of Korea, April 23-26, 2024.

· [I] W. S. Yun, "Frist-Principles Prediction of Structural Stability: Artificial Supercell Structure Bi(Mn1/2Ce1/2)O3 and Bi(Li1/3Zr2/3)O3", Invited Seminar+Meeting for discussion (Host: Prof. C. W. Ahn), Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, March 22, 2024.

• 2023

· [P] W. S. Yun, S. W. Han, H.-J. Lee, J.-S. Kim, and M.-J. Lee, "Thermoelectric performance of TaRuPn (Pn = As, Sb, Bi) half-Heusler compounds" (PO-MON-EN23-297), and W. S. Yun,"Novel semiconductors single-layer ZrHfX4 (X = S, Se) as promising two-dimensional thermoelectric materials" (PO-TUE-2D23-671), The 13th International Conference on Advanced Materials and Devices (ICAMD 2023), Ramada Plaza Jeju Hotel, Jeju Island, Republic of Korea, December 04-08, 2023.

     ▷ [P] Y. Kim, et al., "Exploring memristor-based non-volatile memory devices and oxidation-enhanced resistive memory performance" (PO-THU-ON23-23-363), December 07.

     ▷ [P] N. U. Khan, et al., "Large electrostrictive response via tailoring ergodic relaxor state in Bi1/2Na1/2TiO3-based ceramics" (PO-FRI-ON23-645), December 08.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, November 17, 2023.

· [P] W. S. Yun, H.-J. Lee, J.-S. Kim, M.-J. Lee, and S. W. Han, "Thermoelectric properties of a novel half-Heusler compounds NbRuX (X = Sb and Bi)" (P2-.209), The Korean Physical Society, Fall Meeting, Changwon Exhibition COnvention Center (CECO), Changwon, Republic of Korea, October 24-27, 2023.

     ▷ [P] S. W. Han, et al., "Direct observation of the evolution of Mexican-hat band structure in quasicrystalline Bi (111) thin films" (P1-.209), October 25.

· [P] W. S. Yun, et al., "Two-dimensional ferromagnetism above room temperature in novel single-layer MoI2" (P05-01), The Fall Conference of the Korean Sensors Society, Yeosu The Ocean Resort, Yeosu Jeollanamdo, Republic of Korea, October 11-13, 2023.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, August 18, 2023.

· Meeting for Discussion (Host: Prof. S. W. Han), Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, June 30, 2023.

· [P] W. S. Yun, J.-S. Kim, H.-J. Lee, and M.-J. Lee, "Exploring a novel two-dimensional ferromagnetic materials with high Curie temperature: Single-layer MoI2" (WP1-322), The Korean Magnetics Society, Summer Meeting, Jeju Shinhwa World, Jeju, Republic of Korea, May 24-26, 2023.

· Participation, The Korean Physical Society, Spring Meeting, Daejeon Convention Center (DCC), Daejeon, Republic of Korea, April 19-21, 2023. 

     ▷ [O] S. Y. Lee, W. S. Yun, and J.D. Lee, "Strain-induced bright-to-dark exciton conversion in rippled monolayer MoS2" (B13.02), April 19 (14:12-14:24).

     ▷ [O] S. W. Han et al., "Electronic structure of bismuth quasicrystal grown self-assembly on 2H-MX2 substrates" (A3.03), April 19 (12:48-13:12).

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, March 17, 2023.

· Participation, 1st Yun's Family Travel Abroad, Vinpearl Resort & Golf Nam Hoi An + Fivitel Boutique Da Nang Hotel, Da Nang, Vietnam, Febuary 16-20, 2023.

· [P] W. S. Yun, H.-J. Lee, J.-S. Kim, M.-J. Lee, and S. W. Han, "Thermoelectric Properties of Two-Dimensional Semiconductor ZrTeSe4: A First-Principles Study" (WP1-322), The 30th Korean Conference on Semiconductors (KCS), High 1 Resort Grand Hotel Convention Tower, Jeongseon-Gun Gangwon-Do, Republic of Korea, Febuary 13-15, 2023.

• 2022

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, December 23, 2022.

· Participation, DIGF (Dalseong Innovative Growth Forum) 2022, R1 Conf. Hall (2nd floor), DGIST, Daegu, Republic of Korea, November 17, 2022.

· Participation, DGIF (DGIST Global Innovation Festival) 2022, E1 Convention Hall, DGIST, Daegu, Republic of Korea, November 9-10, 2022.

· Participation, The Korean Physical Society, KPS 70th Anniversary and Fall Meeting, BEXCO, Busan, Republic of Korea, October 18-21, 2022.

     ▷ [P] (P1-se.219) S. W. Han, W. S. Yun, S. Seong, J.-S. Kang, "Angle-resolved photoemission spectroscopy of Bi thin films grown on Bi2O2Se". 

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, September 23, 2022.

· [P] W. S. Yun, H.-J. Lee, J.-S. Kim, M.-J. Lee, and S. W. Han, "Thermoelectric Properties of a Novel Semiconductors Single-layer TlPt2S3" (LDS_P1_1719), The 20th International Symposium on the Physics of Semiconductors and Applications (ISPSA 2022), Ramada Plaza Jeju Hotel, Jeju, Republic of Korea, July 17-21, 2022.

· Participation, The 18th KIAS Conference on Electronic Structure Calculations, On-line Participation, July 7-8, 2022.

· Participation, 2nd Intelligent Semiconductor Workshop (p-CoE), R1 Intl. Conf. Hall (2nd floor), DGIST, Daegu, Republic of Korea, July 06, 2022.

· [I] W. S. Yun, "Electronic and Magnetic Properties of 2D Layered Materials", Workshop of Theory and Computational Magnetics Division (Prof. Hong's Retirement Anniversary), Intl. Bldg. 43, #101, University of Ulsan, Republic of Korea, June 30, 2022.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, April 22, 2022.

• 2021

· Participation, 2021 Intelligent Semiconductor Workshop (p-CoE), R1 Intl. Conf. Hall (2nd floor), DGIST, Daegu, Republic of Korea, September 16, 2021.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, June 25, 2021.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, April 02, 2021.

• 2020

· Participation, 2020 Orbital Workshop - Orbital Current and Orbitronics: Expansion of Spintronics, HwangNyongWon, Gyeongju, Republic of Korea, August 12-13, 2020.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, July 24, 2020.

· [P] W. S. Yun and S. W. Han, "Rashba-type splitting in two dimensional Tl2S/Bi(111) heterostructure", The Korean Physical Society, Spring Meeting, Virtual Conference, Republic of Korea, July 13-15, 2020.

· Meeting for Discussion, Basic Science Research Institute, University of Ulsan, Ulsan, Republic of Korea, May 15, 2020.

• 2019

· [P] W. S. Yun and J. D. Lee, "Two-dimensional ferromagnetic semiconductors single-layer CrXTe3 (X = Si, Ge, and Sn): Stability and magnetic properties", The Korean Magnetics Society, Winter Meeting, ICC Jeju, Jeju, Republic of Korea, November 20-22, 2019.

· Participation, The Korean Physical Society, Fall Meeting, Kim Dae Jung Convention Center, Gwangju, Republic of Korea, October 23-25, 2019.

· [P] W. S. Yun, "Two-dimensional CdPSe3 semiconductor: A promising high-temperature thermoelectric material", 30th International Conference on Defects in Semiconductors (ICDS-30), The Motif, Seattle, Washington, USA, July 21-06, 2019.

· Participation, The 15th KIAS Electronic Structure Calculations Conference, KIAS, Seoul, Republic of Korea, July 04-05, 2019.

· Participation, The Korean Magnetics Society, Spring Meeting, Hanwha Resort Haeundae Tivoli, Busan, Republic of Korea, May 22-24, 2019.

· [O] W. S. Yun and J. D. Lee, "Two-dimensional CdPSe3 semiconductor as a potential candidate for high-performance thermoelectric material", The Korean Physical Society, Spring Meeting, Daejeon Convention Center (DCC), Daejeon, Republic of Korea, April 24-26, 2019.

• 2018

· Participation, The Korean Magnetics Society, Fall Meeting, Hotel Nongshim, Busan, Republic of Korea, November 21-23, 2018.

· [O] W. S. Yun and J. D. Lee, "Exploring a novel atomic layer with extremely low lattice thermal conductivity: ZnPSe3 and its thermoelectrics", The Korean Physical Society, Fall Meeting, Changwon Exhibition COnvention Center (CECO), Changwon, Republic of Korea, October 24-26, 2018.

· [I] W. S. Yun, "Novel Two-Dimensional Semiconductors: Stability, Transport, and Thermoelectric Properties", UOU Invited Seminar, Dept. of Physics, Univ. of Ulsan, Ulsan, Republic of Korea, July 27, 2018.

· [P] W. S. Yun and J. D. Lee, "Structural stability and thermoelectric performance of two-dimensional ZnPS3 and ZnPSe3", The 14th KIAS Conference on Electronic Structure Calculations, KIAS, Seoul, Republic of Korea, June 21-22, 2018.

· [P] W. S. Yun and J. D. Lee, "Tailoring Magnetism of Ferromagnetic Semiconductors of Single-layer CrXTe3 (X = Si, Ge, and Sn): A First-principles Study", The 5th International Conference of Asian Union of Magnetics Societies (IcAUMS 2018), Ramada Plaza Jeju Hotel, Jeju Island, Republic of Korea, June 03-07, 2018.

· Participation, The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 25-27, 2018.

· Participation, The 3rd Workshop on Excited-State Simulation of Matters, Korea Basic Science Institute (KBSI), Daejeon, Republic of Korea, April 13, 2018.

· Participation, The Korean Magnetics Society, Spring Meeting, Sol Beach Samcheok, Samcheok, Republic of Korea, March 29-31, 2018.

• 2017

· [P] W. S. Yun and J. D. Lee, "Stability and electronic structures of novel semiconductors of single-layer ZnPS3 and ZnPSe3: A first-principles study", The 10th International Conference on Advanced Materials and Devices (ICAMD 2017), Ramada Plaza Jeju Hotel, Jeju Island, Republic of Korea, December 05-08, 2017.

· [O] W. S. Yun and J. D. Lee, "Novel 2D Semiconductors ZrNCl and HfNCl: Stability, Transport, Thermoelectric Properties", The Korean Physical Society, Fall Meeting, Hwabaek International COnvention Center (HICO), Gyeongju, Republic of Korea, October 25-27, 2017.

· [P] W. S. Yun and J. D. Lee, "Novel Two-Dimensional Semiconductors ZrNCl and HfNCl: Stability, Electric Transport, Thermoelectric Properties", Recent Progress in Graphene & 2D Materials Research (RPGR 2017), Grand Copthorne Waterfront Hotel, Singapore, September 19-22, 2017.

· Participation, The 1st Workshop on Non-equilibrium Quantum Dynamics, UNIST #110, N103, Ulsan, Republic of Korea, August 17, 2017.

· Participation, Forefronts of Time-Resolved Study & Photonics - The workshop hosted by Global Center for Bio-Convergence Spin System, DGIST International Conference Hall, Daegu, Republic of Korea, July 20, 2017.

· Participation, 6th International Conference on Attosecond Physics (ATTO2017), Shhaxi Guesthouse, Xi'an, China, July 02-07, 2017.

· Participation, The 13th KIAS Conference on Electronic Structure Calculations, KIAS, Seoul, Republic of Korea, June 15-16, 2017.

· Participation, The Korean Magnetics Society, Spring Meeting, Hanwha Resort Haeundae Tivoli, Busan, Republic of Korea, May 24-26, 2017.

· Participation, The 2nd DGIST BiC Spin Center Workshop, Hanwha Resort Haeundae Tivoli, Busan, Republic of Korea, May 23-24, 2017.

· [P] W. S. Yun and J. D. Lee, "First-principles investigation of stability and electronic structure of single-layer ZnPS3 and ZnPSe3", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 19-21, 2017.

• 2016

· [P] W. S. Yun and J. D. Lee, "Magnetic properties of ferromagnetic semiconductors of single-layer CrXTe3 (X = Si, Ge, and Sn): A first-principles study", The Korean Physical Society, Fall Meeting, Kimdaejung Convention Center, Gwangju, Republic of Korea, October 19-21, 2016.

· Participation, The 12th KIAS Conference on Electronic Structure Calculations, KIAS, Seoul, Republic of Korea, June 16-17, 2016.

· [P] W. S. Yun and J. D. Lee, "Tuning of band gap in single- and few-layer Beta-ZrNCl by applying strain and electric field", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 20-22, 2016.

• 2015

· Participation, The Korean Physical Society Fall Meeting, Hwabaek International COnvention Center (HICO), Gyeongju, Republic of Korea, October 21-23, 2015.

· [I] W. S. Yun, "Manipulation of Magnetism in Single-Layer MoS2 by Impurity-Doping and Strain", UOU Invited Seminar, Dept. of Physics, Univ. of Ulsan, Ulsan, Republic of Korea, August 21, 2015.

· Participation, Nano-structured and Low-dimensional Materials: The workshop hosted by DGIST-LBNL Joint Research Center (DLJRC), DGIST Research Admin. B/D (R1), Daegu, Republic of Korea, August 13, 2015.

· Participation, 2015 MPK (Max Planck POSTECH/Korea Research Initiative) Symposium on Frontiers in Materials Science (FMS) - Optics, Materials and Functionality -, POSCO International Center, Pohang, Republic of Korea, June 29-30, 2015.

· [P] W. S. Yun and J. D. Lee, "Interfacial magnetic and electronic properties of MoS2-ferromagnet contact", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 22-24, 2015.

· [P] W. S. Yun and J. D. Lee, "Magnetic Properties of Single-Layer MoS2 on Ni(111) and Co(0001) Surfaces", The 5th Symposium/Workshop of Computational Sciences 2015 (SWOCS-5), POSTECH, Pohang, Republic of Korea, February 03, 2015.

• 2014

· Participation, The 3rd DGIST Global Innovation Festival (DGIF 2014), DGIST, Daegu, Republic of Korea, November 20-21, 2014.

· Participation, The 17th Asian Workshop on First-Principles Electronic Structure Calculations, Alumni Association Building, Yonsei Univesity, Seoul, Republic of Korea, November 2-5, 2014.

· [O] W. S. Yun and J. D. Lee, "Strain-controllable magnetism in single-layer MoS2 with vacancy defect", The Korean Physical Society Fall Meeting, Kimdaejung Convention Center, Gwangju, Republic of Korea, October 22-24, 2014.

· Participation, J.D. Lee and W. S. Yun, "Femtosecond demagnetization of ferromagnetic metal: Cooperative precession of delocalized spins" The 19th International Conference on Ultrafast Phenomena (UP 2014), Okinawa Conventional Center, Okinawa, Japan, July 7-11, 2014 [08.Tue.P2.39].

· Participation, The 10th KIAS Electronic Structure Calculations Conference, KIAS, Seoul, Republic of Korea, June 19-20, 2014.

· [P] W. S. Yun and J. D. Lee, "Electronic and magnetic properties of single-layer MoS2 on magnetic substrate: A first-principles study", Future Energy Materials Workshop - The 1st workshop of future energy materials hosted by DGIST-LBNL Joint Research Center (DLJRC), International Conference Hall, Daegu, Republic of Korea, May 28, 2014.

· Participation, Forefronts of time-resolved study - The 2nd workshop of the time-resolved study hosted by DGIST-LBNL Joint Research Center (DLJRC), International Conference Hall, DGIST, Daegu, Republic of Korea, May 8, 2014.

· [P] W. S. Yun and J. D. Lee, "Electronic and magnetic properties of single-layer MoS2 on magnetic substrate: A first-principles study", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 23-24, 2014.

• 2013

· [P] W. S. Yun and J. D. Lee, "Unexpected strong magnetism of Cu doped single-layer MoS2 and its origin", The 8th International Conference on Advanced Materials and Devices (ICAMD 2013), Jeju Ramada Hotel, Jeju Island, Republic of Korea, December 11-13, 2013.

· [P] W. S. Yun and J. D. Lee, "Possible magnetism by strain in single-layer MoS2 with vacancy defect", DGIST Global Innovation Festival 2013 (DGIF 2013), EXCO, Daegu, Republic of Korea, November 21-22, 2013.

· [P] W. S. Yun and J. D. Lee, "Possible magnetism by strain in signle-layer MoS2 with vacancy defect", The Korean Physical Society, Fall Meeting, Changwon Exhibition Convention Center (CECO), Changwon, Republic of Korea, October 30 - November 1, 2013.

· Participation, J. D. Lee, W. S. Yun, and S. C. Hong, "BaFe2As2: First-principles Study of Electronc Structure and Magnetism and Ultrafast Resurrection of SDW at T>TSDW", Asia-Pacific Conference of Theoretical and Computational Chemistry 6 (APCTCC 6), Hilton Hotel, Gyeongju, Gyeongbuk, Republic of Korea, July 10-13, 2013.

· Participation, Spectroscopic perspectives of novel superconductors (The workshop hosted by DGIST-LBNL Joint Research Center), Hotel Novotel Daegu City Centre, Daegu, Republic of Korea, July 5, 2013.

· [P] W. S. Yun and J. D. Lee, "Origin of magnetism in 3d transition-metal doped single-layer MoS2", The 9th KIAS Electronic Structure Calculations Conference, KIAS, Seoul, Republic of Korea, June 20-21, 2013.

· [P] W. S. Yun, J. D. Lee, and S. C. Hong, "Electronic structure and magnetism of superconducting BaFe2As2 from first-principles study", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 24-26, 2013.

· Participation, Forefronts of time-resolved study (The workshop hosted by DGIST-LBNL Joint Research Center), Hotel Novotel Daegu City Centre, Daegu, Republic of Korea, April 11, 2013.

• 2012

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "Electronic Structure and Magnetism of Alloying Elements Substituted B2 FeAl Intermetallic Compounds: A Density Functional Study", The Korean Magnetic Society, Winter Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, November 30 - December 1, 2012.

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "First-principles Investigation on Fundamental Magnetism and Electronic Structures of a-Mn", The Korean Magnetic Society, Winter Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, November 30 - December 1, 2012.

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "Effect of 3d transition metal substitution on fundamental properties of Fe-Al compounds: A density functional study", The Korean Physical Society, Fall Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, October 24-26, 2012.

· Participation (for Chairperson), International Symposium on First-principles Calculations, University of Ulsan, Ulsan, Republic of Korea, July 17, 2012.

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "Fundamental magnetism of Fe-P alloys and FexP (x = 2, 3) compounds: A density functional study", The 19th International Conference on Magnetism (ICM 2012), BEXCO, Busan, Republic of Korea, July 8-13, 2012.

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "First-principles Thermodynamics of Fe-Si Binary Systems", Conference on Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD) XLI, DoubleTree by Hilton Hotel, Berkeley, California, USA, June 3-8, 2012.

· [O] W. S. Yun, J. Y. Lee, J. I. Kim, Y.-U. Heo, and I. G. Kim, "Feasibility study on the MxP compound precipitation in the Fe-P-M system", POSCO Project 2nd Gate Review with Future Products Research Group Researcher, POSCO Technical Research Laboratories, Pohang, Republic of Korea, May 30, 2012.

· [P] W. S. Yun, J. Y. Lee, and I. G. Kim, "Fundamental Properties of MxP (M = Ti, V, Fe; x = 2, 3) Binary and Ternary Compounds", The Korean Magnetics Society Summer Meeting, Hotel Interciti, Daejeon, Republic of Korea, May 24-25, 2012.

· [O] W. S. Yun, J. Y. Lee, and I. G. Kim, "First-Principles Study on Thermondynamic Properties of Fe-Al Intermetallic Compounds", Spring Conference of the Korean Institute of Metals and Materials, Hyundai Sungwoo Resort, Hoengseong-Gun Gangwon-Do, Republic of Korea, April 26-27, 2012.

· [O] W. S. Yun, J. Y. Lee, Y.-U. Heo, and I. G. Kim, "Feasibility study on the MxP compound precipitation in the Fe-P-M system", POSCO Project Final Report & 1st Gate Review with Future Products Research Group Researcher, POSCO Technical Research Laboratories, Pohang, Republic of Korea, February 22, 2012.

· Participation, J. Y. Lee, W. S. Yun, and I. G. Kim, "Physics of alloys from first-principles", The 16-th Magnetism Theory symposium of The Korean Magnetics Society & 2012 Workshop on Physics of Magnetism and Ferrous Materials, POSTECH, Pohang, Republic of Korea, February 13-14, 2012.

• 2011

· Participation, W. S. Yun, J. Y. Lee, Y.-U. Heo, and I. G. Kim, "Feasibility study on the MxP compound precipitation in the Fe-P-X system", POSCO Project Kcikoff Meeting with Future Products Research Group Researcher, POSCO Technical Research Laboratories, Pohang, Republic of Korea, December 26, 2011.

· Participation, W. S. Yun and I. G. Kim, "First-Principles Investigation of Fe-Al Intermetallic Compounds", POSCO Project 2nd Gate Review with Future Products Research Group Researcher, GIFT in POSTECH, Pohang, Republic of Korea, December 23, 2011.

· [P] W. S. Yun, J. Y. Lee, I. G. Kim, S. C. Hong, and J. I. Lee, "Fundamental magnetic and elastic properties of Fe-Si alloys: A first-principles study", The Korean Magnetics Society - 2011 Winter Conference, Jeju Ramada Hotel, Jeju Island, Republic of Korea, December 5-7, 2011.

· Participation, W. S. Yun and I. G. Kim, "Surveying high-P contained steels for improving steel's mechanical properties", POSCO Project 3rd Gate Review with Future Products Research Group Researcher, GIFT in POSTECH, Pohang, Republic of Korea, November 24, 2011.

· [P] W. S. Yun, J. Y. Lee, I. G. Kim, S. C. Hong, and J. I. Lee, "First-principles investigation of magnetic and elastic properties of Fe-Si alloys", 56th Annual Conference on Magnetism & Magnetic Materials, JW Marriott Desert Ridge in Scottsdale, Arizona, USA, October 28 - November 3, 2011.

· [O] W. S. Yun and I. G. Kim, "First-Principles Study on Fundamental Properties of Fe-P Alloys and M3P (M = Ti, V, Cr, Fe, and Ni) Compounds", Fall Conference of the Korean Institute of Metals and Materials, Daejeon Convention Center, Daejeon, Republic of Korea, October 27-28, 2011.

· [O] W. S. Yun and I. G. Kim, "First-Principles Investigation of Fe-Al Intermetallic Compounds", POSCO Project with Sheet Products and Process Research Group in POSCO Technical Research Laboratories, Gwangyang, Republic of Korea, September 23, 2011.

· [O] W. S. Yun and I. G. Kim, "Surveying high-P contained steels for improving steel's mechanical properties", POSCO Project 2nd Gate Review with Next Generation Products Research Group Researcher, GIFT in POSTECH, Pohang, Republic of Korea, August 30, 2011.

· [O] W. S. Yun and I. G. Kim, "Surveying high-P contained steels for improving steel's mechanical properties", POSCO Project 2nd Gate Review (Prof. B.-J. Lee) with Next Generation Products Research Group Researcher, POSTECH, Pohang, Republic of Korea, July 6, 2011.

· Participation, The 7th KIAS Electronic Structure Calculations Conference, KIAS, Seoul, Republic of Korea, June 23-24, 2011.

· [P] W. S. Yun and I. G. Kim, "Fundamental Magnetism of Fe3P Intermetallic Compounds", The Korean Magnetics Society Summer Meeting, Cheonan Sangnok Resort, Cheonan, Republic of Korea, June 9-11, 2011.

· [O] W. S. Yun and I. G. Kim, "Surveying high-P contained steels for improving steel's mechanical properties - Fundamental Properties of Fe3P and Alloying Effect", POSCO Project 1st Gate Review with Next Generation Products Research Group Researcher, POSCO Technical Research Laboratories, Pohang, Republic of Korea, May 18, 2011.

· [O] W. S. Yun and I. G. Kim, "Surveying high-P contained steels for improving steel's mechanical properties (2nd Part)", POSCO Project Kickoff Meeting with Next Generation Products Research Group Researcher, POSCO Technical Research Laboratories, Pohang, Republic of Korea, March 30, 2011.

• 2010

· Participation, Physics of Mangetism and Ferrous Materials Workshop, POSTECH, Pohang, Republic of Korea, December 10, 2010.

· [P] W. S. Yun, D. Odkhuu, S. C. Hong, and J. I. Lee, "Magnetocrystalline Anisotropy of a Zinc Blende CrTe (001) Surface: A First-Principles Study", International Conference of AUMS (ICAUMS 2010), Lotte Hotel, Jeju Island, Republic of Korea, December 5-8, 2010.

· [O] W. S. Yun, "Magnetocrystalline Anisotropy and Magnetostriction of Transition Metal Compounds: Density Functional Study", Ph.D. Defense, Natural Science Building, Ulsan, Republic of Korea, November 29, 2010.

· [P] W. S. Yun, S. C. Hong, J. I. Lee, and C. Hwang, "Magnetism of Co Layers grown on a W(001) Surface: a Density Functional Study", The 13th Asian Workshop on First-Principles Electronic Structure Calculations, POSCO Int'l Center in POSTECH, Pohang, Republic of Korea, November 1-3, 2010.

· Participation, Symposium / Workshop of Computational Sciences 2010 (SWOCS II), POSCO Int'l Center in POSTECH, Pohang, Republic of Korea, October 31, 2010.

· [P] W. S. Yun, D. Odkhuu, and S. C. Hong, "Large Magnetostriction of Fe1-xZnx Alloy: Density Functional Study", The Korean Physical Society, Fall Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, October 20-22, 2010.

· Participation, The 16th Magnetism Theory Symposium, Hotel Tirol in Muju Resort, Muju-Gun Jeonbuk, Republic of Korea, October 8, 2010.

· [P] W. S. Yun, O. Kwon, S. C. Hong, Y. S. Kim, and B. S. Mun, "Effect of atomic oxygen adsorption on band structures of Pt(111) surface: Density functional study", Mongolian-German Workshop on Advanced Materials, Natl. Univ. of Mongolia, Ulaanbaatar, Mongolia, September 27-30, 2010.

· Participation, The 6th KIAS Electronic Structure Calculations Conference, KIAS, Seoul, Republic of Korea, June 21-22, 2010.

· [O] W. S. Yun, S. C. Hong, J. I. Lee, and C. Hwang, "Magnetism of Co Layers grown on a W(001) Surface: a Density Functional Study", The Busan·Ulsan·Gyeongnam Physical Society, Ulsan Natl. Institute of Science and Technology, Ulsan, Republic of Korea, June 18, 2010.

· Participation, SNU-Berkeley Symposium, Sangsan Mathematical Sciences Bldg. (129-101), Seoul Natl. Univ., Seoul, Republic of Korea, May 14, 2010.

· Participation, Surface and Subsurface Branch Symposium, Department of Chemistry (E6-4), KAIST, Daejeon, Republic of Korea, May 7, 2010.

· [P] W. S. Yun and S. C. Hong, " First Principles Prediction of Large Magnetostriction of Fe-Zn Alloy", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 23-24, 2009.

· Participation, Workshop on Physics of Ferrous Materials, POSTECH, Pohang, Republic of Korea, January 26-27, 2010.

• 2009

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "Strong magnetocrystalline anisotropy of D022-Mn3Ga from density functional stydy", The 6th International Conference on Advanced Materials and Devices (ICAMD 2009), Jeju Ramada Hotel, Jeju Island, Republic of Korea, December 9-11, 2009.

· [P] W. S. Yun, G.-B. Cha, T. H. Rho, D. H. Han, and S. C. Hong, "Magnetism of Fe monolayers on nonmagnetic fcc transition metal (Cu, Rh, Pd, and Ag) (001) surfaces", The Busan·Ulsan·Gyeongnam Physical Society, Pukyong Natl. Univ., Busan, Republic of Korea, December 4, 2009.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, " Magnetocrystalline anisotropy of D022-Mn3Ga: Density functional study", The Korean Physical Society, Fall Meeting, Changwon Exhibition Convention Center (CECO), Changwon, Republic of Korea, October 21-23, 2009.

· [P] W. S. Yun, M.-C Jung, S. C. Hong, Y. M. Lee, Y. Park, M. Han, H.-N. Hwag, C.-C. Hwang, and M. Kim, " Bonding length change of N2 molecule in Ge(100) by using the first-principle calculation", The Korean Vacuum Society, Summer Meeting, The Ocean Resort, Yeosu Jeollanamdo, Republic of Korea, August 19-21, 2009.

· [P] W. S. Yun, S. C. Hong, and J. I. Lee, " MCA of a Zinc Blende CrTe (001) Surface: First-Principles Study", Internal Conference on Magnetism (ICM 2009), Stadthalle Karlsruhe (Congress Center), Karlsruhe, Germany, July 26-31, 2009.

· [P] W. S. Yun, S. C. Hong, and J. I. Lee, " Magnetocrystalline Anisotropy of Zinc Blende CrTe Thin Film: Density Functional Study", The 5th KIAS Electronic Structure Calculations Workshop, KIAS, Seoul, Republic of Korea, June 18-19, 2009.

· [P] W. S. Yun, S. C. Hong, and J. I. Lee, " First Principles Calculations on Magnetocrystalline Anisotropy of Zinc-Blende CrTe (001) Surfaces", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 23-24, 2009.

· [P] W. S. Yun and S. C. Hong, "Magnetism and Magnetocrystalline Anisotropy of Fe Monolayer on W Substrates: A First Principles Study", The Korean Vacuum Society, Winter Meeting, Hyundai Sungwoo Resort, Hoengseong-Gun Gangwon-Do, Republic of Korea, February 11-13, 2009.

• 2008

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "Magnetism and Magnetocrystalline Anisotropy at fcc Fe (001) Surface", Asian Magnetics Conference 2008, Paradise Hotel, Busan, Republic of Korea, December 10-13, 2008.

· Participation, The Busan·Ulsan·Gyeongnam Physical Society, Univ. of Ulsan, Ulsan, Republic of Korea, November 28, 2008.

· Participation, Max Planck Society-Korea Joint Symposium: Frontiers in Materals Science, POSTECH, Pohang, Republic of Korea, October 29-30, 2008.

· [P] W. S. Yun and S. C. Hong, " Magnetostriction of Fe-Ge Alloy from First-Principles Calculations", The Korean Physical Society, Fall Meeting, Kim Dae Jung Convention Center, Gwangju, Republic of Korea, October 23-24, 2008.

· [P] W. S. Yun and S. C. Hong, "Magnetostricton and elasticity of BeFe binary alloys", The Busan·Ulsan·Gyeongnam Physical Society, Dong-Eui Univ., Busan, Republic of Korea, May 30, 2008.

· [P] W. S. Yun and S. C. Hong, " Magnetostriction of BeFe binary alloy from first-principles calculations", The Korean Physical Society, Spring Meeting, Daejeon Convention Center, Daejeon, Republic of Korea, April 17-18, 2008.

• 2007

· [P] W. S. Yun, Y. H. Hwang, S. Cho, and S. C. Hong, "Magnetism of Tetragonal Distorted a-Mn: Ab Initio Density Functional Study", The Korean Magnetics Society, Winter Meeting, Sunchon Natl. Univ., Sunchon, Republic of Korea, December 6-8, 2007.

· [O] W. S. Yun and S. C. Hong, "Half- Metallicity and Magnetism of Zinc-Blende Bulk and Surface Cr-Chalcogenides: Density Functional Study", The Busan·Ulsan·Gyeongnam Physical Society, Changwon Natl. Univ., Changwon, Republic of Korea, November 17, 2007.

· [P] W. S. Yun, D. Lee, G.-B. Cha, and S. C. Hong, "Fist-Principles Calculations on Electronic Structure and Magnetism of fcc Fe (001) Surface", The Korean Physical Society, Fall Meeting, Jeju International Convention Center, Jeju Island, Republic of Korea, October 18-19, 2007.

· [P] W. S. Yun and S. C. Hong, "Half- Metallicity and Magnetism of Zinc-Blende Bulk and Surface Cr-Chalcogenides: Density Functional Study", The 13th International Conference on II-VI Compounds, Shilla Hotel, Jeju Island, Republic of Korea, September 10-14, 2007.

· [P] W. S. Yun, D. Lee, G.-B. Cha, and S. C. Hong, "Surface induced magnetic transition at a fcc Fe (001) surface: Density functional study", Third Seeheim Conference on Magnetism, Frankfurt, Germany, August 26-30, 2007.

· Participation, The 3rd KIAS Electronic Structure Calculations Workshop, KIAS, Seoul, Republic of Korea, June 19, 2007.

· [P] W. S. Yun and S. C. Hong, "Electronic structure and magnetism of NiAs and Zinc-blende type MnTe: first-principles calculation", The Korean Physical Society, Spring Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, April 19-20, 2007.

• 2006

· Participation, The 13th Magnetism Theory Symposium, POSTECH, Pohang, Republic of Korea, December 15, 2006.

· [P] W. S. Yun and S. C. Hong, "First-Principles study on Electronic Structure and Magnetism of Zinc-Blende Cr-Chalcogenides", The Korean Physical Society, Fall Meeting, Meeting, Daegu EXPO, Daegu, Republic of Korea, October 19-20, 2006.

· [P] W. S. Yun and S. C. Hong, "Half-Metallic Ferromagnetism of (CrP)1/(GaP)1 Superlattice: A First-Principles Study", International Conference on Magnetism (ICM 2006), Kyoto International Conference Hall, Kyoto, Japan, August 20-25, 2006

· [P] W. S. Yun and S. C. Hong, "Electronic Structure and Magnetism of MnN/GaN Superlattices with Wurtzite Structure: First-Principles Study", The Korean Physical Society, Spring Meeting, Pheonix Park, Pyeongchang-Gun Gangwon-Do, Republic of Korea, April 19-20, 2006.

· Participation, 2006 Surface Magnetism Miniworkshop, Sookmyung Women's Univ., Seoul, Republic of Korea, January 13, 2006.

• 2005

· Participation, The 12th Magnetism Theory Symposium, Inha Univ., Inchon, Republic of Korea, December 16, 2004.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "Half-Metallicity of (MnSb)1/(GaSb)n (n = 1, 3, 5, and 7) Digital Alloys:First-Principles Calculations", The 4th International Conference on Advanced Materials and Devices (ICAMD 2005), Jeju Ramada Hotel, Jeju Island, Republic of Korean, December 5-7, 2005.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "First-principles calculations on electronic structure and magnetism of GaSb/MnSb superlattices", The Korean Physical Society, Fall Meeting, Chunbuk Natl. Univ., Jeonju, Republic of Korea, October 21-23, 2005.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "The electronic structure and magnetism of GdSi2 by first-principles study", ISAMT/SOMMA 2005, Grand Hotel in Taipei, Taiwan, August 24-27, 2005.

· [P] W. S. Yun, G.-B. Cha, S. Cho, and S. C. Hong, "First principles calculations on electronic structure and magnetism of β-Mn", ISAMT/SOMMA 2005, Grand Hotel in Taipei, Taiwan, August 24-27, 2005.

· Participation, The 2nd KIAS Workshop on Electronic Structure Calculations, KIAS, Seoul, Republic of Korea, June 13-15, 2005.

· [P] W. S. Yun, G.-B. Cha, S. Cho, and S. C. Hong, "First principles calculations on electronic structure and magnetism of β-Mn", The Korean Magnetics Society, Summer Meeting, Jeju Ramada Hotel, Jeju Island, Republic of Korea, June 1-3, 2005.

• 2004

· Participation, The 11th Magnetism Theory Symposium, Univ. of Ulsan, Ulsan, Republic of Korea, December 16, 2004.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "First Principles Calculations on Electronic Structure and Magnetism of GdSi2", The Korean Magnetics Society, Winter Meeting, Youngpyong Resort, Republic of Korea, December 9-11, 2004.

· [P] W. S. Yun, G.-B. Cha, and S. C. Hong, "First Principles Calculations on Electronic Structure and Magnetism of GdSi2", 7th Asian Workshop on First-Principles Electronic Structure Calculations, Tamkang Univ., Taipei, Taiwan, November 1-3, 2004.

· [P] W. S. Yun, S. H. Lee, G.-B. Cha, and S. C. Hong, "First Principles Calculations on Electronic Structure and Magnetism of GdSi2", The Korean Physical Society, Fall Meeting, Jeju Natl. Univ., Jeju Island, Republic of Korea, October 21-23, 2004.

· Participation, The Korean Magnetics Society, Summer Meeting, Chung-Mu Marina Resort, Tongyeong, Republic of Korea, June 10-12, 2004.

· Participation, The Korean Physical Society, Spring Meeting, Sungkyunkwan Univ., Suwon, Republic of Korea, April 23-24, 2004.

• 2003

· Participation, eSSc, Muju Resort, Muju-Gun Jeonbuk, Republic of Korea, 2003.

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[P]oster Presentations, [O]ral Presentations, and [I]nvited Seminar.