115. Study on superconducting properties of CeIrIn5 thin films grown via pulsed laser deposition

 Ji-Hoon Kang, Jihyun Kim, Tae Beom Park, Woo Seok Choi, Sungmin Park, and Tuson Park

 J. Phys. Condens. Matter 34, 455602 (2022)

114. Atomic-scale Operando Observation of Oxygen Diffusion during Topotactic Phase Transition of a Perovskite Oxide

 Yaolong Xing#, Inhwan Kim#, Kyeong Tae Kang#, Bumsu Park, Zhen Wang, Jong Chan Kim, Hu Young Jeong, Woo Seok Choi*, Jaekwang Lee*, Sang Ho Oh*

 Matter 5, 3009 (2022)

113. Tunable Ferromagnetism in LaCoO3 Epitaxial Thin Films

 Dongwon Shin#, Sangmoon Yoon#, Sehwan Song, Sungkyun Park, Ho Nyung Lee, and Woo Seok Choi*

Adv. Mater. Interfaces 9, 2200433 (2022) / arXiv

112. High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

 Soon-Gil Jung*, Yoonseok Han, Jin Hee Kim, Rahmatul Hidayati, Jong-Soo Rhyee, Jung Min Lee, Won Nam Kang, Woo Seok Choi, Hye-ran Jeon, Jaekwon Suk, and Tuson Park*

 Nat. Commun. 13, 3373 (2022)

111. Mixed-state Hall scaling behavior and vortex phase diagram in FeSe0.7Te0.3 thin films

 Dongwon Shin, Soon-Gil Jung*, Sehun Seo, Jongmin Lee, Sanghan Lee, Jin Hee Kim, Jong-Soo Rhyee, Woo Seok Choi, and Tuson Park*

 Phys. Rev. B 105, 064519 (2022)

110. Unconventional interlayer exchange coupling via chiral phonons in synthetic magnetic oxide heterostructures

 Seung Gyo Jeong, Jiwoong Kim, Ambrose Seo, Sungkyun Park, Hu Young Jeong, Young-Min Kim, Valeria Lauter, Takeshi Egami, Jung Hoon Han, and Woo Seok Choi*

 Sci. Adv. 8, eabm4005 (2022) / arXiv / 물첨

109. Atomistic Engineering of Phonons in Functional Oxide Heterostructures

 Seung Gyo Jeong, Ambrose Seo, and Woo Seok Choi*

 Adv. Sci. 9, 2103403 (2022) / arXiv

108. Contribution of the Sub-Surface to Electrocatalytic Activity in Atomically Precise La0.7Sr0.3MnO3 Heterostructures

 Jegon Lee#, Prajwal Adiga#, Sang A Lee, Seung Hyun Nam, Hyeon-Ah Ju, Min-Hyong Jung, Hu Young Jeong, Young-Min Kim, Cindy Wong, Radwan Elzein, Rafik Addou, Kelsey A. Stoerzinger*, and Woo Seok Choi*

 Small 17, 2103632 (2021) 

107. Correlated Oxide Dirac Semimetal in the Extreme Quantum Limit

 Jong Mok Ok#, Narayan Mohanta#, Jie Zhang#, Sangmoon Yoon, Satoshi Okamoto, Eun Sang Choi, Hua Zhou, Megan Briggeman, Patrick Irvin, Andrew R. Lupini, Yun-Yi Pai, Elizabeth Skoropata, Changhee Sohn, Haoxiang Li, Hu Miao, Benjamin Lawrie, Woo Seok Choi, Gyula Eres, Jeremy Levy, Ho Nyung Lee*

 Sci. Adv. 7, eabf9631 (2021) / arXiv

106. Tuning magnetic and optical properties through strain in epitaxial LaCrO3 thin films

 Yogesh Sharma*, Binod Paudel, Jegon Lee, Woo Seok Choi, Han Wang, Yingge Du, Kyeong Tae Kang, Ghanshyam Pilania, and Aiping Chen

 Appl. Phys. Lett. 119, 071902 (2021) / arXiv

105. Tailoring topological Hall effect in SrRuO3/SrTiO3 superlattices

 Seong Won Cho#, Seung Gyo Jeong#, Hee Young Kwon, Sehwan Song, Seungwu Han, Jung Hoon Han, Sungkyun Park, Woo Seok Choi*, Suyoun Lee*, Jun Woo Choi*

 Acta Mater. 216, 117153 (2021) / arXiv

104. Ultra-thin ferroelectrics

 Huimin Qiao, Chenxi Wang, Woo Seok Choi*, Min Hyuk Park*, and Yunseok Kim*

 Mater. Sci. Eng. R Rep. 145, 100622 (2021)

103.  Strain-Induced Atomic-Scale Building Blocks for Ferromagnetism in Epitaxial LaCoO3 

 Sangmoon Yoon, Xiang Gao, Jong Mok Ok, Zhaoliang Liao, Myung-Geun Han, Yimei Zhu, Panchapakesa Ganesh, Matthew F. Chisholm, Woo Seok Choi, and Ho Nyung Lee*

 Nano Lett. 21, 4006 (2021) / arXiv

102. Defect engineering of the magnetic phase in EuTiO3 epitaxial thin films

 Dongwon Shin#, Inseo Kim#, Sehwan Song, Yu-seong Seo, Jungseek Hwang, Sungkyun Park, Minseok Choi*, and Woo Seok Choi*

 J. Am. Ceram. Soc. 104, 4606 (2021)

101. Low thermal conductivity of SrTiO3-LaTiO3 and SrTiO3-SrNbO3 thermoelectric oxide solid solutions

 Yuqiao Zhang, Hai Jun Cho, Kenyu Sugo, Masashi Mikami, Sungmin Woo, Myung-Chul Jung, Yao-Hua Zhuang, Bin Feng, Yu-Miin Sheu, Woosuck Shin, Woo Seok Choi, Myung Joon Han, Yuichi Ikuhara, and Hiromichi Ohta*

 J. Am. Ceram. Soc. 104, 4075 (2021)

100. Epitaxial Stabilization of Metastable 3C BaRuO3 Thin Film with Ferromagnetic Non-Fermi Liquid Phase

 Sang A Lee, Jong Mok Ok, Jegon Lee, Jae-Yeol Hwang, Se-Jeong Park, Sehwan Song, Jong-Seong Bae, Sangmoon Yoon, Sungkyun Park, Ho Nyung Lee, and Woo Seok Choi*

 Adv. Electron. Mater. 7, 2001111 (2021) / arXiv

99.  Color of Copper/Copper Oxide

 Su Jae Kim#, Seonghoon Kim#, Jegon Lee#, Yongjae Jo, Yu-Seong Seo, Myounghoon Lee, Yousil Lee, Chae Ryong Cho, Jong-Pil Kim, Miyeon Cheon, Jungseek Hwang, Yong In Kim, Young-Hoon Kim, Young-Min Kim, Aloysius Soon, Myunghwan Choi, Woo Seok Choi*, Se-Young Jeong*, and Young Hee Lee*

 Adv. Mater. 33, 2007345 (2021) / arXiv

98. Atomic Structure of the Initial Nucleation Layer in Hexagonal Perovskite BaRuO3 Thin Films 

 Sangmoon Yoon, Jong Mok Ok, Sang A Lee, Jegon Lee, Andrew R. Lupini, Woo Seok Choi*, and Ho Nyung Lee*

 Adv. Mater. Interfaces 8, 2100023 (2021) / arXiv / Cover

97. Symmetry-Driven Spin-Wave Gap Modulation in Nanolayered SrRuO3/SrTiO3 Heterostructures: Implications for Spintronic Applications 

 Seung Gyo Jeong#, Hyeonbeom Kim#, Sung Ju Hong#, Dongseok Suh*, Woo Seok Choi*

 ACS Appl. Nano Mater. 4, 2160 (2021) / arXiv

96. Crystalline symmetry-dependent magnon formation in the itinerant ferromagnet SrRuO3 

Hyun Il Seo#, Sungmin Woo#, Jihyun Kim#, Seung Gyo Jeong, Tuson Park, and Woo Seok Choi*

 Phys. Rev. B 103, 045104 (2021) / arXiv

95. Epitaxial strain dependent electrocatalytic activity in CaRuO3 thin films

 Jegon Lee, So-Yeon Jun, Taekjib Choi, Donggeun Jung, Jong-Seong Bae, Sang A Lee*, and Woo Seok Choi*

 Appl. Phys. Lett. 117, 163906 (2020) Editor's Pick

94. Spin-phonon coupling in epitaxial SrRuO3 heterostructures

 Seung Gyo Jeong#, Suyoun Lim#, Jiwoong Kim, Sungkyun Park, Hyunsik Jeong*, and Woo Seok Choi*

 Nanoscale 12, 13926 (2020)

93.  Propagation Control of Octahedral Tilt in SrRuO3 via Artificial Heterostructuring

 Seung Gyo Jeong, Gyeongtak Han, Sehwan Song, Taewon Min, Ahmed Yousef Mohamed, Sungkyun Park, Jaekwang Lee, Hu Young Jeong, Young-Min Kim, Deok-Yong Cho, and Woo Seok Choi*

 Adv. Sci. 7, 2001643 (2020) / arXiv

92. Pulsed-laser epitaxy of metallic delafossite PdCrO2 films

 Jong Mok Ok, Matthew Brahlek, Woo Seok Choi, Kevin Roccapriore, Matthew F. Chishlom, Soyeun Kim, Changhee Sohn, Elizabeth Skoropata, Sangmoon Yoon, Jun Sung Kim, and Ho Nyung Lee*

 APL Mater. 8, 051104 (2020) / arXiv

91. Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal  

 Seung Gyo Jeong#, Taewon Min#, Sungmin Woo, Jiwoong Kim, Yu-Qiao Zhang, Seong Won Cho, Jaeseok Son, Young-Min Kim, Jung Hoon Han, Sungkyun Park, Hu Young Jeong, Hiromichi Ohta, Suyoun Lee, Tae Won Noh, Jaekwang Lee*, and Woo Seok Choi*

 Phys. Rev. Lett. 124, 026401 (2020) / arXiv / 물첨

90. Ferroelectricity in SrTiO3 epitaxial thin films via Sr-vacancy-induced tetragonality

 Kyeong Tae Kang#, Hyun Il Seo#, Owoong Kwon, Kyoungjun Lee, Jong-Seong Bae, Ming-Wen Chu, Seung Chul Chae, Yunseok Kim, Woo Seok Choi*

 Appl. Surf. Sci. 499, 143930 (2020)

89. Surface-orientation-dependent growth of SrRuO3 epitaxial thin films

 Sungmin Woo, Hyuk Choi, Seunghun Kang, Jegon Lee, Adrian David, Wilfrid Prellier, Yunseok Kim, Hyun You Kim, Woo Seok Choi*

 Appl. Surf. Sci. 499, 143924 (2020) 

88.  Indium-Free Amorphous Ca-Al-O as Transparent Conducting Oxide

 So Hee Sim#, Kyeong Tae Kang#, Sangyun Lee, Miso Lee, Hiroki Taniguchi, Suyoung Kim, Seulki Roh, Junhyeob Oh, Sang A Lee, Jong-Seong Bae, Jae Hyuck Jang, Jungseek Hwang, Seungwu Han, Tuson Park and Woo Seok Choi*

 Chem. Mater. 31, 8019 (2019)

87. Thickness-Dependent Orbital Hybridization in Ultrathin SrRuO3 Epitaxial Films

 Huimin Jeong, Seung Gyo Jeong, Ahmed Yousef Mohamed, Minji Lee, Woo-suk Noh, Younghak Kim, Jong-Seong Bae, Woo Seok Choi*, and Deok-Yong Cho*

 Appl. Phys. Lett. 115, 092905 (2019)

86. Synthesis of heavy fermion CeCoIn5 thin film via pulsed laser deposition

 Jihyun Kim, Hanul Lee, Sangyun Lee, Sungmin Park*, Tuson Park*, YoonHee Cho, Hyoyoung Lee, Won Nam Kang, and Woo Seok Choi

 Curr. Appl. Phys. 19, 1338 (2019)

85. (LaCoO3)n(SrCoO2.5)n superlattices: Tunable ferromagnetic insulator

 S. J. Noh, G. H. Ahn, J. H. Seo, Zheng Gai, Ho Nyung Lee, Woo Seok Choi*, and S. J. Moon*

 Phys. Rev. B 100, 064415 (2019)

84. Correlation between Ru-O hybridization and the oxygen evolution reaction in ruthenate epitaxial thin films

 Sang A Lee#, Jegon Lee#, Seokjae Oh, Suyoun Lee, Jong-Seong Bae, Won Chegal, Mangesh S. Diware, Sungkyun Park, Seo Hyoung Chang, Taekjib Choi, and Woo Seok Choi*

 Sustain. Energ. Fuels 3, 2867 (2019)

83. Confined polaronic transport in (LaFeO3)n/(SrFeO3)1 superlattices

 Seo Hyoung Chang, Seong Keun Kim, Young-Min Kim, Yongqi Dong, Chad M. Folkman, Da Woon Jeong, Woo Seok Choi, Albina Y. Borisevich, Jeffery A. Eastman, Anand Bhattacharya, Dillon D. Fong

 APL Mater. 7, 071117 (2019)

82. Nano-scale heat transport through the hetero-interface of SrRuO3 thin films

 D. G. Jeong, H.-I. Ju, Y. G. Choi, C. J. Roh, S. Woo, W. S. Choi, J. Lee*

 Nanotechnology 30, 374001 (2019)

81. A Room-Temperature Ferroelectric Ferromagnet in a 1D Tetrahedral Chain Network   

 Kyeong Tae Kang, Changjae Roh, Jinyoung Lim, Taewon Min, Jun Han Lee, Kyoungjun Lee, Tae Yoon Lee, Seunghun Kang, Daehee Seol, Jiwoong Kim, Hiromichi Ohta, Amit Khare, Sungkyun Park, Yunseok Kim, Seung Chul Chae, Yoon Seok Oh, Jaekwang Lee, Jaejun Yu, Jong Seok Lee, and Woo Seok Choi*

 Adv. Mater. 31, 1808104 (2019) / arXiv / Cover / 물첨

80.  Synergetic Behavior in 2D Layered Material/Complex Oxide Heterostructures

 Kyeong Tae Kang, Jeongmin Park, Dongseok Suh*, and Woo Seok Choi*

 Adv. Mater. 31, 1803732 (2019) / arXiv

79. Ferroelectric Polarization Rotation in Order-Disorder-Type LiNbO3 Thin Films

 Tae Sup Yoo#, Sang A Lee#, Changjae Roh, Seunghun Kang, Daehee Seol, Xinwei Guan, Jong-Seong Bae, Jiwoong Kim, Young-Min Kim, Hu Young Jeong, Seunggyo Jeong, Ahmed Yousef Mohamed, Deok-Yong Cho, Ji Young Jo, Sungkyun Park, Tom Wu, Yunseok Kim, Jongseok Lee, and Woo Seok Choi*

 ACS Appl. Mater. Interfaces 10, 41471 (2018) / arXiv

78.  Oxygen-deficient triple perovskites as highly active and durable bifunctional electrocatalysts for oxygen electrode reactions

 Nam-In Kim, Sung Ryul Choi, Rana Arslan Afzal, Taekjib Choi, Young-Soo Seo, Junyeon Hwang, Tae Sup Yoo, Woo Seok Choi, Youg Jin Sa, Sang Hoon Joo*, Jun-Young Park*

 Sci. Adv. 4, eaap9360 (2018)

77. Effect of Nb concentration on the spin-orbit coupling strength in Nb-doped SrTiO3 epitaxial thin films

 Seong Won Cho, Milim Lee, Sungmin Woo, Kanghoon Yim, Seungwu Han, Woo Seok Choi, and Suyoun Lee

 Sci. Rep. 8, 5739 (2018)

76. Oxygen vacancy induced structural evolution of SrFeO3-x epitaxial thin film from brownmillerite to perovskite 

 Seulki Roh, Seokbae Lee, Myounghoon Lee, Yu-Seong Seo, Amit Khare, Taesup Yoo, Sungmin Woo, Woo Seok Choi, Jungseek Hwang*, A. Glamazda, and K.-Y. Choi

 Phys. Rev. B 97, 075104 (2018) / arXiv

75. Enhanced magnetic and thermoelectric properties in epitaxial polycrystalline SrRuO3 thin films

 Sungmin Woo, Sang A Lee, Hyeona Mun, Yong Gwan Choi, Chan June Zhung, Soohyeon Shin, Morgane Lacotte, Adrian David, Wilfrid Prellier, Tuson Park, Won Nam Kang, Jong Seok Lee, Sung Wng Kim and Woo Seok Choi*

 Nanoscale 10, 4377 (2018) / arXiv

74. Directing Oxygen Vacancy Channels in SrFeO2.5 Epitaxial Thin Films

 Amit Khare, Jaekwang Lee, Jaesoung Park, Gi-Yeop Kim, Si-Young Choi, Takayoshi Katase, Seulki Roh, Tae Sup Yoo, Jungseek Hwang, Hiromichi Ohta, Junwoo Son, and Woo Seok Choi*

 ACS Appl. Mater. Interfaces 10, 4831 (2018)

73. Strongly Coupled Magnetic and Electronic Transitions in Multivalent Strontium Cobaltites

 J. H. Lee*, Woo Seok Choi, H. Jeen, H.-J. Lee, J. H. Seo, J. Nam, M. S. Yeom*, and Ho Nyung Lee*

 Sci. Rep. 7, 16066 (2017)

72. Ex-situ atomic force microscopy on the growth mode of SrRuO3 epitaxial thin film

 Bora Kim#, Sang A Lee#, Daehee Seol, Woo Seok Choi*, and Yunseok Kim*

 Curr. Appl. Phys. 17, 1721 (2017) / arXiv

71. Tuning electromagnetic properties of SrRuO3 epitaxial thin films via atomic control of cation vacancies

 Sang A Lee, Seokjae Oh, Jegon Lee, Jae-Yeol Hwang, Jiwoong Kim, Sungkyun Park, Jong-Seong Bae, Tae Eun Hong, Suyoun Lee, Sung Wng Kim, Won Nam Kang, and Woo Seok Choi*

 Sci. Rep. 7, 11583 (2017) / arXiv

70.  Origin of Hystersis in CH3NH3PbI3 Perovskite Thin Films

 Daehee Seol#, Ahreum Jeong#, Man Hyung Han, Seongrok Seo, Tae Sup Yoo, Woo Seok Choi, Hyun Suk Jung, Hyunjung Shin*, and Yunseok Kim*

 Adv. Func. Mater. 27, 1701924 (2017)

69. Topotactic Metal-Insulator Transition in Epitaxial SrFeOx Thin Films

 Amit Khare, Dongwon Shin, Tae Sup Yoo, Minu Kim, Tae Dong Kang, Jaekwang Lee, Seulki Roh, Jungseek Hwang, Sung Wng Kim, Tae Won Noh, Hiromichi Ohta, and Woo Seok Choi*

 Adv. Mater. 29, 1606566 (2017) / Cover

68. Optical investigation of oxygen defect states in SrTiO3 epitaxial thin films

 Il Wan Seo, Y.S. Lee*, Sang A Lee, and Woo Seok Choi

 Curr. Appl. Phys. 17, 1148 (2017)

67. Highly insulating ferromagnetic cobaltite heterostructures

 Woo Seok Choi*, Kyeong Tae Kang, Hyoungjeen Jeen, Zheng Gai, and Ho Nyung Lee

 Curr. Appl. Phys. 17, 722 (2017)

66. Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films  

 Sang A Lee#, Seokjae Oh#, Jae-Yeol Hwang, Minseok Choi, Chulmin Youn, Ji Woong Kim, Seo Hyoung Chang, Sungmin Woo, Jong-Seong Bae, Sungkyun Park, Young-Min Kim, Suyoun Lee, Taekjib Choi, Sung Wng Kim, and Woo Seok Choi*

 Energy Environ. Sci. 10, 924 (2017) / arXiv / Highlight

65. Quantum conductance probing of oxygen vacancies in SrTiO3 epitaxial thin film using graphene   

 Kyeong Tae Kang#, Haeyong Kang#, Jeongmin Park#, Dongseok Suh*, and Woo Seok Choi*

 Adv. Mater. 29, 1700071 (2017) / arXiv / Cover / 물첨 

64. Highly Oriented SrTiO3 Thin Film on Graphene Substrate

 Sang A Lee#, Jae-Yeol Hwang#, Eun Sung Kim, Sung Wng Kim*, and Woo Seok Choi*

 ACS Appl. Mater. Interfaces 9, 3246 (2017) / arXiv

63. Valence state reflectometry of complex oxide heterointerfaces 

 Jorge E Hamann-Borrero, Sebastian Macke, Woo Seok Choi, Ronny Sutarto, Feizhou He, Abdullah Radi, Ilya Elfimov, Robert J Green, Martius W. Haverkort, Volodymyr B Zabolotnyy, Ho Nyung Lee, George A Sawatzky & Vladimir Hinkov*

 npj Quantum Mater. 1, 16013 (2016) / Highlight

62. Tunable band gap in epitaxial ferroelectric Ho(Mn,Ga)O3 films

 Daesu Lee, Woo Seok Choi, Tae Won Noh*

 Appl. Phys. Lett. 108, 192901 (2016)

61. Phase transitions via selective elemental vacancy engineering in complex oxide thin films

 Sang A Lee, Hoidong Jeong, Sungmin Woo, Jae-Yeol Hwang, Si-Young Choi, Sung-Dae Kim, Minseok Choi, Seulki Roh, Hosung Yu, Jungseek Hwang, Sung Wng Kim, and Woo Seok Choi*

 Sci. Rep. 6, 23649 (2016) / arXiv

 60.  Voltage Scaling of Graphene Device on SrTiO3 Epitaxial Thin Film

 Jeongmin Park#, Haeyoung Kang#, Kyeong Tae Kang#, Yoojoo Yun, Young Hee Lee, Woo Seok Choi*, and Dongseok Suh*

 Nano Lett. 16, 1754 (2016) / arXiv

59. Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum

 Ho Nyung Lee*, Sung S. Ambrose Seo, Woo Seok Choi, and Christopher M. Rouleau

 Sci. Rep. 6, 19941 (2016) / arXiv

58.  Strain Control of Oxygen Vacancies in Epitaxial Strontium Cobaltite Films

 Jonathan R. Petrie, Chandrima Mitra, Hyoungjeen Jeen, Woo Seok Choi, Tricia L. Meyer, Fernando A. Reboredo, John W. Freeland, Gyula Eres, and Ho Nyung Lee*

 Adv. Func. Mater. 26, 1564 (2016) / arXiv

57. Structural instability of the CoO4 tetrahedral chain in SrCoO3–δ thin films

 A. Glamazda, K.-Y. Choi*, P. Lemmens, Woo Seok Choi, Hyoungjeen Jeen, Tricia L. Meyer, and Ho Nyung Lee

 J. Appl. Phys. 118, 085313 (2015)

56.  Resonant tunnelling in a quantum oxide superlattice

 Woo Seok Choi, Sang A Lee, Jeong Ho You, Suyoun Lee, and Ho Nyung Lee*

 Nat. Commun. 6, 7424 (2015) / arXiv

55. Strain tuning of electronic structure in Bi4Ti3O12-LaCoO3 epitaxial thin films

 Woo Seok Choi & Ho Nyung Lee

 Phys. Rev. B 91, 174101 (2015) / arXiv

54. Surface properties of atomically flat poly-crystalline SrTiO3 

 Sungmin Woo, Hoidong Jeong, Sang A Lee, Hosung Seo, Morgane Lacotte, Adrian David, Hyun You Kim, Wilfrid Prellier, Yunseok Kim, and Woo Seok Choi*

 Sci. Rep. 5, 8822 (2015) / arXiv

53. Room temperature optical anisotropy of a LaMnO3 thin-film induced by ultra-short pulse laser

 Purevdorj Munkhbaatar, Zsolt Marton, Baatarchuluun Tsermaa, Woo Seok Choi, Sung Seok A. Seo, Jin Seung Kim, Naoyuki Nakagawa, Harold Y. Hwang, Ho Nyung Lee, and Kim Myung-Whun*

 Appl. Phys. Lett. 106, 092907 (2015)

52.  Role of Strain and Conductivity in Oxygen Electrocatalysis on LaCoO3 Thin Films

 Kelsey A. Stoerzinger, Woo Seok Choi, Hyoungjeen Jeen, Ho Nyung Lee, Yang Shao-Horn*

 J. Phys. Chem. Lett. 6, 487 (2015)

51.  Polaron Transport and Thermoelectric Behavior in La-doped SrTiO3 Thin Films with Elemental Vacancies

 Woo Seok Choi*, Hyang Keun Yoo, and Hiromichi Ohta

 Adv. Func. Mater. 25, 799 (2015) / arXiv

50. Dimensionality Control of d-orbital Occupation in Oxide Superlattices 

 Da Woon Jeong, Woo Seok Choi, Satoshi Okamoto, Jae-Young Kim, Kyung Wan Kim, Soon Jae Moon, Deok-Yong Cho, Ho Nyung Lee, and Tae Won Noh*

 Sci. Rep. 4, 6124 (2014) / arXiv

49. Resistance switching in epitaxial SrCoOx thin films

 Octolia T. Tambunan, Kadek J. Parwanta, Susant K. Acharya, Bo Wha Lee, Chang Uk Jung*, Yeon Soo Kim, Bae Ho Park, Huiseong Jeong, Ji-Yong Park, Myung Rae Cho, Yun Daniel Park, Woo Seok Choi, Dong-Wook Kim, Hyunwoo Jin, Suyoun Lee, Seul Ji Song, Sung-Jin Kang, Miyoung Kim and Cheol Seong Hwang

 Appl. Phys. Lett. 105, 063507 (2014)

48. Transparent conducting oxides: A δ-doped superlattice approach

 Valentino R. Cooper, Sung Seok A. Seo, Suyoun Lee, Jun Sung Kim, Woo Seok Choi, Satoshi Okamoto, and Ho Nyung Lee*

 Sci. Rep. 4, 6021 (2014)

47. Thermopower Enhancement by Fractional Layer Control in 2D Oxide Superlattices

 Woo Seok Choi, Hiromichi Ohta, and Ho Nyung Lee*

 Adv. Mater. 26, 6701 (2014) / arXiv / Cover / Highlight

46.  Nanoscale Spin-State Ordering in LaCoO3 Epitaxial Thin Films

 Ji-Hwan Kwon, Woo Seok Choi, Young-Kyun Kwon, Ranju Jung, Jian-Min Zuo, Ho Nyung Lee, and Miyoung Kim*

 Chem. Mater. 26, 2496 (2014)

45. Tunneling Electroresistance Induced by Interfacial Phase Transitions in Ultrathin Oxide Heterostructures

 Lu Jiang#, Woo Seok Choi#, Hyoungjeen Jeen, Shuai Dong, Yunseok Kim, Sergei V. Kalinin, Elbio Dagotto, Takeshi Egami, and Ho Nyung Lee*

 Nano Lett. 13, 5837 (2013) / arXiv / Highlight

44. Orienting Oxygen Vacancies for Fast Catalytic Reaction

 Hyoungjeen Jeen, Zhonghe Bi, Woo Seok Choi, Matthew F. Chisholm, Craig A. Bridges, M. Parans Paranthaman, and Ho Nyung Lee*

 Adv. Mater. 25, 6459 (2013) / arXiv / Highlight

43. Direct observation of asymmetric domain wall motion in a ferroelectric capacitor

 Ja Kyung Lee, Ga-Young Shin, Kyung Song, Woo Seok Choi, Yoon Ah Shin, Seong Yong Park, Jason Britson, Ye Cao, Long-Qing Chen, Ho Nyung Lee, and Sang Ho Oh*

 Acta Mater. 61, 6765 (2013)

42. Indications of strong neutral impurity scattering in Ba(Sn,Sb)O3 single crystals

 Hyung Joon Kim, Jiyeon Kim, Tai Hoon Kim, Woong-Jhae Lee, Byung-Gu Jeon, Ju-Young Park, Woo Seok Choi, Da Woon Jeong, Suk Ho Lee, Jaejun Yu, Tae Won Noh, and Kee Hoon Kim*

 Phys. Rev. B 88, 125204 (2013)

41.  Reversal of the Lattice Structure in SrCoOx Epitaxial Thin Films Studied by Real-Time Optical Spectroscopy and First-Principles Calculations 

 Woo Seok Choi#, Hyoungjeen Jeen#, Jun Hee Lee, Sung Seok A. Seo, Valentiono R. Cooper, Karin M. Rabe, and Ho Nyung Lee*

 Phys. Rev. Lett. 111, 097401 (2013) / arXiv / Highlight

40. Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge  

 H. Jeen, W. S. Choi, M. D. Biegalski, C. M. Folkman, I. C. Tung, D. D. Fong, J. W. Freeland, D. Shin, H. Ohta, M. F. Chisholm, and H. N. Lee*

 Nat. Mater. 12, 1057 (2013) / arXiv / Highlight

39. Topotactic Phase Transformation of the Brownmillerite SrCoO2.5 to the Perovskite SrCoO3–δ 

 H. Jeen, W. S. Choi, J. W. Freeland, H. Ohta, C. U. Jung and H. N. Lee*

 Adv. Mater. 25, 3651 (2013) / arXiv / Highlight

38.  Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces 

Woo Seok Choi, Christopher M. Rouleau, Sung Seok A. Seo, Zhenlin Luo, Hua Zhou, Tim T. Fister, Jeffrey A. Eastman, Paul H. Fuoss, Dillon D. Fong, Jonathan Z. Tischler, Gyula Eres, Matthew F. Chisholm, and Ho Nyung Lee*

 Adv. Mater. 24, 6423 (2012) / arXiv / Cover / Highlight 1 / Highlight 2

37. Strain-Induced Spin States in Atomically Ordered Cobaltites

 Woo Seok Choi, Ji-Hwan Kwon, Hyoungjeen Jeen, Jorge E. Hamann-Borrero, Abdullah Radi, Sebastian Macke, Ronny Sutarto, Feizhou He, George A. Sawatzky, Vladimir Hinkov, Miyoung Kim, and Ho Nyung Lee*

 Nano Lett. 12, 4966 (2012) / arXiv / Highlight

36. Fractionally δ-Doped Oxide Superlattices for Higher Carrier Mobility

 Woo Seok Choi, Suyoun Lee, Valentino R. Cooper, and Ho Nyung Lee*

 Nano Lett. 12, 4590 (2012) / arXiv / Highlight

35. Strongly coupled phase transition in ferroelectric/correlated electron oxide heterostructures

 Lu Jiang, Woo Seok Choi, Hyoungjeen Jeen, Takeshi Egami, and Ho Nyung Lee*

 Appl. Phys. Lett. 101, 042902 (2012) / arXiv

34. Band gap tuning in ferroelectric Bi4Ti3O12 by alloying with LaTMO3 (TM = Ti, V, Cr, Mn, Co, Ni, and Al)

 Woo Seok Choi and Ho Nyung Lee*

 Appl. Phys. Lett. 100, 132903 (2012) / arXiv

33. Wide bandgap tunability in complex transition metal oxides by site-specific substitution

 Woo Seok Choi, Matthew F. Chisholm, David J. Sing, Taekjib Choi, Gerald E. Jellison Jr. and Ho Nyung Lee*

 Nat. Commun. 3, 689 (2012) / arXiv / Highlight

32. Optical characterization of band gap graded ZnMgO films

 Woo Seok Choi and Jong-Gul Yoon

 Solid State Commun. 152, 345 (2012)

31. Electroluminescence from n-n isotype heterojunctions of graded-band-gap ZnMgO:Al and ZnO films on platinized Si

 Jong-Gul Yoon*, Sung Woo Cho, W S Choi, Dae Yeol Kim, H Chang, C O Kim, J Lee, H Jeon, S-H Choi and T W Noh

 J. Phys. D: Appl. Phys. 44, 415402 (2011)

30. Optical spectroscopy of carrier dynamics in LaVO3/SrVO3 superlattices

 D. W. Jeong, Woo Seok Choi, T. D. Kang, C. H. Sohn, A. David, H. Rotella, A. A. Sirenko, Cheol Hyeok Lee, Jae H. Kim, U. Lüders, W. Prellier, Y.-J. Kim, Yun Sang Lee and T. W. Noh*

 Phys. Rev. B 84, 115132 (2011)

29. Charge states and magnetic ordering in LaMnO3/SrTiO3 superlattices

 Woo Seok Choi, D. W. Jeong, S. S. A. Seo, Y. S. Lee, T. H. Kim, S. Y. Jang, H. N. Lee* and K. Myung-Whun*

 Phys. Rev. B 83, 195113 (2011) / arXiv

28. LaMnO3 Thin Films Grown by Using Pulsed Laser Deposition and Their Simple Recovery to a Stoichiometric Phase by Annealing

 Woo Seok Choi*, Da Woon Jeong, Seung Yup Jang, Z. Marton, Sung Seok A. Seo, Ho Nyung Lee, Yun Sang Lee

 J. Korean Phys. Soc. 58, 569 (2011)

27. Metal-Insulator-like Transition in the LaAlO3/BaTiO3 Interface

 S. C. Chae, W. S. Choi, H. K. Yoo and B. S. Kang*

 Curr. Appl. Phys. 11, 521 (2011)

26. Control of defect-mediated tunneling barrier heights in ultrathin MgO films

 D. J. Kim, W. S. Choi, F. Schleicher, R. H. Shin, S. Boukari, V. Davesne, C. Kieber, J. Arabski, G. Schmerber, E. Beaurepaire, W. Jo and M. Bowen

 Appl. Phys. Lett. 97, 263502 (2010) / arXiv

25. The electronic structure of epitaxially stabilized 5d perovskite Ca1-xSrxIrO3 (x = 0, 0.5, and 1) thin films: the role of strong spin-orbit coupling

 S Y Jang, H Kim, S J Moon, W S Choi, B C Jeon, J Yu, T W Noh

 J. Phys.: Condens. Matter 22, 485602 (2010) / arXiv

24. Temperature-dependent Raman scattering study of multiferroic MnWO4

 Luc Huy Hoang, N. T. M. Hien, W. S. Choi, Y. S. Lee, K. Taniguchi, T. Arima, S. Yoon, X. B. Chen and In-Sang Yang

 J. Raman Spectrosc. 41, 1005 (2010)

23. Electronic structure of double perovskite A2FeReO6 (A = Ba and Ca): interplay between spin-orbit interaction, electron correlation, and lattice distortion

 B C Jeon, C H Kim, S J Moon, Woo Seok Choi, Hogyun Jeong, Y S Lee, J Yu, C J Won, J H Jung, N Hur, and T W Noh

 J. Phys.: Condens. Matter 22, 345602 (2010)

 22. Dimensional crossover of polaron dynamics in Nb:SrTiO3/SrTiO3 superlattices: Possible mechanism of thermopower enhancement

 Woo Seok Choi, Hiromichi Ohta, Soon Jae Moon, Yun Sang Lee, and Tae Won Noh

 Phys. Rev. B 82, 024301 (2010) / arXiv / Kaleidoscope

21. Dual character of magnetism in EuFe2As4: Optical spectroscopic and density-functional calculation study

 S.J. Moon, J.H. Shin, D. Parker, W.S. Choi, I.I. Mazin, Y.S. Lee, J.Y. Kim, N.H. Sung, B.K. Cho, S.H. Khim, J.S. Kim, K.H. Kim, and T.W Noh

 Phys. Rev. B 81, 205114 (2010) / arXiv

 20. Electronic structure and anomalous band-edge absorption feature in multiferroic MnWO4: An optical spectroscopic study

 Woo Seok Choi, K. Taniguchi, S. J. Moon, S. S. A. Seo, T. Arima, H. Hoang, I.-S. Yang, T. W. Noh, and Y. S. Lee

 Phys. Rev. B 81, 205111 (2010) / arXiv

19.  Two-Dimensional Confinement of 3d1 Electrons in LaTiO3/LaAlO3 Multilayers

 S. S. A. Seo, M. J. Han, G. W. J. Hassink, W. S. Choi, S. J. Moon, J. S. Kim, T. Susaki, Y. S. Lee, J. Yu, C. Bernhard, H. Y. Hwang, G. Rijnders, D. H. A. Blank, B. Keimer, T. W. Noh

 Phys. Rev. Lett. 104, 036401 (2010) / arXiv

18. Temperature-dependence of the electronic structure of the Jeff,1/2 Mott insulator Sr2IrO4 studied by optical spectroscopy

 S. J. Moon, Hosub Jin, W. S. Choi, J. S. Lee, S. S. A. Seo, J. Yu, G. Cao, T. W. Noh, and Y. S. Lee

 Phys. Rev. B 80, 195110 (2009) / arXiv

17. Electronic structure of amorphous InGaO3(ZnO)0.5 thin films

 Deok-Yong Cho, Jaewon Song, Cheol Seong Hwang, Woo Seok Choi, T. W. Noh, J.-Y. Kim, H.-G. Lee, B.-G. Park, S.-Y. Cho, S.-J. Oh, Jong Han Jeong, Jae Kyeong Jeong, and Yeon-Gon Mo

 Thin Solid Films 518, 1079-1081 (2009)

16. Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures

 S. S. A. Seo, Z. Marton, W. S. Choi, G. W. J. Hassink, D. H. A. Blank, H. Y. Hwang, T. W. Noh, T. Egami, and H. N. Lee

 Appl. Phys. Lett. 95, 082107 (2009) / arXiv

15. Influence of the Magnetic Correlation to the Electronic Structure of Hexagonal TbMnO3 Thin Films Investigated by Using Optical Spectroscopy

 W. S. Choi, S. J. Moon, B. C. Jeon, J. H. Lee, and Y. S. Lee

 J. Korean Phys. Soc. 55, 754 (2009)

14. Effects of oxygen-reducing atmosphere annealing on LaMnO3 epitaxial thin films

 W S Choi, Z Marton, S Y Jang, S J Moon, B C Jeon, J H Shin, S S A Seo, T W Noh, K Myung-Whun, H N Lee, and Y S Lee

 J. Phys. D: Appl. Phys. 42, 165401 (2009) / arXiv

13. Electronic Structure of the NiOx Film Fabricated by Using a Thermal Oxidation Technique

 Y. K. Seo, D. J. Lee, Y. S. Lee, W. S. Choi, and D.-W. Kim

 J. Korean Phys. Soc. 55, 129 (2009)

 12. Localized electronic states induced by defects and possible origins of ferroelectricity in strontium titanate thin films

 Y. S. Kim, J. Kim, S. J. Moon, W. S. Choi, Y. J. Chang, J.-G. Yoon, J. Yu, J.-S. Chung, and T. W. Noh

 Appl. Phys. Lett. 94, 202906 (2009) / arXiv

11. Influence of High-Temperature Postdeposition Annealing on the Atomic Configuration in Amorphous In-Ga-Zn-O Films

 Deok-Yong Cho, Jaewon Song, Yong Cheol Shin, Cheol Seong Hwang, Woo Seok Choi, and Jae Kyeong Jeong

 Electrochem. Solid St. 12, H208-H210 (2009)

10. Effect of dimethylhydrazine in p-type conductivity of as-grown Mg-doped GaN

 Dong Hyuk Kim, Go Eun Lee, Euijoon Yoon, Do-Young Park, Hyeonsik Cheong, Woo Seok Choi, Tae Won Noh, Jin-Hyoung Cho, and Joong-Seo Park

 Phys. Stat. Sol. (RRL) 3, 52-54 (2009)

9.  Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Transition Metal Oxides Srn+1IrnO3n+1 (n=1, 2, and ∞)

 S. J. Moon, H. Jin, K. W. Kim, W. S. Choi, Y. S. Lee, J. Yu, G. Cao, A. Sumi, H. Funakubo, C. Bernhard, and T. W. Noh

 Phys. Rev. Lett. 101, 226402 (2008) / arXiv

8. Optical spectroscopic investigation on the coupling of electronic and magnetic structure in multiferroic hexagonal RMnO3 (R=Gd, Tb, Dy, and Ho) thin films

 Woo Seok Choi, Soon Jae Moon, Sung Seok A. Seo, Daesu Lee, Jung Hyuk Lee, Pattukkannu Murugavel, Tae Won Noh, and Yun Sang Lee

 Phys. Rev. B 78, 054440 (2008) / arXiv

7.  Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap Compound La4Ru2O10

 S. J. Moon, W. S. Choi, S. J. Kim, Y. S. Lee, P. G. Khalifah, D. Mandrus, and T. W. Noh

 Phys. Rev. Lett. 100, 116404 (2008) / arXiv

6. Electronic structures of hexagonal RMnO3 (R=Gd, Tb, Dy, and Ho) thin films: Optical spectroscopy and first-principles calculations

 Woo Seok Choi, Dong Geun Kim, Sung Seok A. Seo, Soon Jae Moon, Daesu Lee, Jung Hyuk Lee, Ho Sik Lee, Deok-Yong Cho, Yun Sang Lee, Pattukkannu Murugavel, Jaejun Yu, and Tae Won Noh

 Phys. Rev. B 77, 045137 (2008) / arXiv

5. Composition-dependent polarization switching behaviors of (111)-preferred polycrystalline Pb(ZrxTi1-x)O3 thin films

 J. Y. Jo, S. M. Yang, H. S. Han, D. J. Kim, W. S. Choi, T. W. Noh, T. K. Song, J.-G. Yoon, C.-Y. Koo, J.-H. Cheon, S.-H. Kim

 Appl. Phys. Lett. 92, 012917 (2008) / arXiv

4.  Optical Study of the Free-Carrier Response of LaTiO3/SrTiO3 Superlattices

 S. S. A. Seo, W. S. Choi, H. N. Lee, L. Yu, K. W. Kim, C. Bernhard, and T. W. Noh

 Phys. Rev. Lett. 99, 266801 (2007) / arXiv

3. Optical Characterization of Doped SrTiO3 in a Wide Photon Energy Region

 S. J. Kim, S. S. A. Seo, S. J. Moon, W. S. Choi, N. H. Hur, Y. K. Seo, and Y. S. Lee

 J. Korean Phys. Soc. 51, 161 (2007)

2.  Ferroelectricity in Artificial Bicolor Oxide Superlattices

 S. S. A. Seo, J. H. Lee, H. N. Lee, M. F. Chischlom, W. S. Choi, D. J. Kim, J. Y. Jo, H. Kim, J. Yu, and T. W. Noh

 Adv. Mater. 19, 2460-2464 (2007) / arXiv

1. Dielectric constants of Ir, Ru, Pt, and IrO2: Contributions from bound charges

 W. S. Choi, S. S. A. Seo, K. W. Kim, M. Y. Kim, S. Shin, and T. W. Noh

 Phys. Rev. B 74, 205117 (2006) / arXiv