Publications

1.  Definitive Fermi-Surface Mapping of High-Purity RuO2 via Angle-Dependent Quantum Oscillations
   Ju Hyeon Kim, Joonyoung Choi, Jae Hyuck Lee, Hoil Kim, Hyeongwoo Seo, Jun Seong Lee, Myeongjun Kang, Eun Sang Choi, Woun Kang, Jong Mok Ok, Jun Sung Kim; Changyoung Kim, Younjung Jo*

2. Self-Adaptive Conduction in β-Ga2O3 Schottky Diodes across a Wide Temperature Range

Huiwon Kim, Byeongcheol Choe, Gwangcheol Ji, Suji Im, Hyunkyung Lee, Yeongdeuk Mun, Hyeyun Chung, Min-seok Jang, Ho-Jun Lee, Hyoungjeen Jeen, Haeyong Kang, Sungkyun Park* and Jong Mok Ok*

3. Epitaxial p-Type CuGaO2 Thin Films Integrated with β-Ga2O3 for Heterostructure Device

Gwangcheol Ji, Huiwon kim, Byeongcheol Choe, Suji Im, Younghun Kim, Hyoungjeen Jeen, Haeyong Kang, Won Jae Lee, Jeongwoo Kim*, Sungkyun Park* and Jong Mok Ok*

4. Nucleation-Controlled Rapid Homoepitaxy of β-Ga2O3 on On-Axis (100) Single Crystals

Suji Im, Byeongcheol Choe, Huiwon Kim, Gwangcheol Ji, MyeongJun Kang, Haeyong Kang, Hyoungjeen Jeen, Sungkyun Park and Jong Mok Ok*

5. Crystallite size-dependent phase transition and thermodynamic stability of λ–Ti3O5 

Seyoung Kwon, Usman Khalid, Minsik Kong, Seonghoon Han, Dooyong Lee, Kang Hyun Park, Jong Mok Ok, and Sungkyun Park

6. Observation of Berezinskii-Kosterlitz-Thouless spin correlations in a two-dimensional S = 5/2 Heisenberg antiferromagnet

Seung-Ho Baek*, Junik Hwang, Myeongjun Kang, Hyeong Woo Seo, Jun Sung Kim, Jong Mok Ok*

7. Plasmonic polaron in self-intercalated 1T-TiS2

Byoung Ki Choi†, Woojin Choi†, Zhiyu Tao†, Ji-Eun Lee, Sae Hee Ryu, Seungrok Moon, Hyobeom Lee, Kyoungree Park, Seha Lee, Hayoon Im, Yong Zhong, Hyejin Ryu, Min Jae Kim, Sue Hyeon Hwang, Xuetao Zhu, Jiandong Guo, Jong Mok Ok, Jaekwang Lee8 Haeyong Kang, Sungkyun Park, Jonathan D. Denlinger, Heung-Sik Kim, Aaron Bostwick1, Zhi-Xun Shen, Choongyu Hwang*, Sung-Kwan Mo*, Jinwoong Hwang*

8. Hyperbolic plasmon polaritons in metallic delafossite oxides

Sangmoon Yoon, Carlos Maciel-Escudero, Jong Mok Ok, Seoung-Hun Kang, Mario Zapata-Herrera, Ho Seong Jeon, Baekjune Kang, Yunkyu Park, Shan Lin, Jeongkeun Song, Changhee Sohn, Mina Yoon, Hu Miao, Rainer Hillenbrand, Junsung Kim, Ambrose Seo, Javier Aizpurua, Andrew R. Lupini, Ho Nyung Lee*

9. Emergence of Two-dimensional Excitons in Three-Dimensional Crystal

Baekjune Kang†, Junhee Shin†, Myeongjun Kang, Uksam Choi, Uihyeon Seo, Kunook Chung, Jong Mok Ok*, Hosub Jin*, Changhee Sohn*

1. Symmetry-engineered chiral magnetotransport in the correlated oxide SrNbO3

Jeongkeun Song, Seoung-Hun Kang, Lucas Lindsay, Satoshi Okamoto, Yunkyu Park, Hu Miao, Jong Mok Ok ,Ho Nyung Lee 

npj Quantum Materials, 2026

2. Observation of gapless collective charge fluctuations in an Anderson insulating state

Jong Mok Ok, Beom Jun Park, Junik Hwang, Seonghoon Park, Myeongjun Kang, Jun Sung Kim, Ki-Seok Kim*, Seung-Ho Baek*

Sci. Rep, 2025

3. Achieving high-crystallinity YSZ thin films on Si via explainable AI and Bayesian optimization with minimal growth trials

Gwangcheol Ji†, Jaehyun Seo†, Suji Im, Byeongcheol Choe, Myeongjun Kang, Hyoungjeen Jeen, Sungkyun Park*, Junegak Joung*, Jong Mok Ok*

Crystal growth & design, 2025

4. Spin-orbit coupling induced enhancement of upper critical field in superconducting A15 single crystals

Seohee Kim, Gichan Son, Minsik Kong, Youngji Cho, Min Jae Kim, Huiwon Kim, Eun Sang Choi, Sangmoon Yoon, Jeongwoo Kim*, Jong Mok Ok*

Journal of Alloys and Compounds, 2025

5. Correlation between electrical and structural changes in amorphous ITO films

Seonghoon Han, Yeongjun Son, Sehwan Song, Jisung Lee, Jong-Seong Bae, Anh Tuan Thanh Pham, Thang Bach Phan, Jeong Hwan Kim, Jong Mok Ok, Dooyong Lee*, Sungkyun Park*

Vacuum 239, 114441, 2025

6. Effect of helium ion-beam irradiation on physical properties of Si-doped Ga2O3 epitaxial thin films

Yeongdeuk Mun, Seungho Jung, Hyeyun Chung, Jaehoon Jeong, Sangkyun Ryu, Jun Kue Park, Tae Eun Hong, Jong Mok Ok, Sungkyun Park, Hyoungjeen Jeen*

Journal of the Korean Physical Society, 2025

7. Growth environment dependent phase propagation of ilmenite-hematite (1-x)FeTiO3-xFe2O3 films

Dooyong Lee, Sehwan Song, Hyeonyu Kim, Hyunkyung Lee, Jisung Lee, Minjae Kim, Jinbae Lee, Sang Woon Hwang, Sangmoon Yoon, Younghak Kim, Chang -woo Cho, Younjung Jo, Jong Mok Ok, Jae-Ho Chun, Sungkyun Park

Journal of Alloys and Compounds, 2025

8. Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6

Baekjune Kang†, Uksam Choi†, Taek Sun Jung†, Seunghyeon Noh†, Gye-Hyeon Kim, UiHyeon Seo, Miju Park, Jin-Hyun Choi, Minjae Kim, GwangCheol Ji, Sehwan Song, Hyesung Jo, Seokjo Hong, Nguyen Xuan Duong, Tae Heon Kim, Yongsoo Yang, Sungkyun Park, Jong Mok Ok, Jung-Woo Yoo*, Jae Hoon Kim*, Changhee Sohn*

Nat. Commun., 2025

9. Transient heat-flux method for measuring heat capacity: examples from Cu and VO2

Dongjin Jang*, Min Sik Kong, Jong Mok Ok*

Curr. Appl. Phys., 2025

10. 121Sb NMR Study in A15 Superconductor Ti3Sb

Junik Hwang, Seohee Kim, Jong Mok Ok, Seung-Ho Baek*

New Phys.: Sae Mulli, 2025

11. Optical characterization of the charge density wave phase of 9R BaRuO3 thin film

H. W. Nam, D. W. Kim, S. A. Lee, Jong Mok Ok, W. S. Choi, S. J. Moon,*

Journal of Alloys and Compounds, 2025

12. Strain programming of oxygen octahedral symmetry in CaNbO3 thin films

Yunkyu Park, Seoung-Hun Kang, Jeongkeun Song, Sang Woon Hwang, Shan Lin, Jong Mok Ok, Fazhi Yang, Hwangsun Kim, Andrew R. Lupini, Mina Yoon, Sangmoon Yoon, Hua Zhou*, Ho Nyung Lee*

Adv. Mater. Interfaces, 2024

13. Hole-Carrier-Dominant Transport in 2D Single-Crystal Copper

Jong Mok Ok, Kyungrok Kang, Jounghoon Hyun, Chan-young Lim, Seonggeon Gim, Jinwoong Hwang, Jonathan D. Denlinger, Miyeon Cheon, Binod Regmi, Ji-Eun Lee, Hyejin Ryu, Su Jae Kim, Yousil Lee, Young-Hoon Kim, Young-Min Kim, Yeongkwan Kim*, Seong-Gon Kim*, Heejun Yang*, Se-Young Jeong,*

Adv. Mater. 2024, 2403783, 2024

14. Tuning the flat band with in-plane biaxial strain and the emergence of superconductivity in Ni3Sn

Hye Jung Kim, Min Jae Kim, Jaekwang Lee, Jong Mok Ok*, Chang-Jong Kang*

Phys. Rev. B, 2024

15. Suppression of antiferromagnetic order by strain-enhanced frustration in honeycomb cobaltate

Gye-Hyeon Kim†, Miju Park†, Uksam Choi, Baekjune Kang, Uihyeon Seo, GwangCheol Ji, Seunghyeon Noh, Deok-Yong Cho, Jung-Woo Yoo, Jong Mok Ok, Changhee Sohn*

Sci. Adv., 2024

16. Large anomalous Hall conductivity induced by spin chirality fluctuation in an ultraclean frustrated antiferromagnet PdCrO2

Hoseong Jeon, Hyungwoo Seo, Junho Seo, Yong Hyun Kim, Eun Sang Choi, Y. J. Jo, Ho Nyung Lee, Jong Mok Ok*, Jun Sung Kim*

Communications Physcis, 2024

17. Solvent-free Microfabrication of Thin Film Device Using The Focused Ion Beam

Hoseong Jeon†, Sehwan Song†, Sungkyun Park, Jun Sung Kim*, Jong Mok Ok*

Curr. Appl. Phys., 2024

18. Large-size Single Crystal Growth for Quantum Materials by Czochraski method

Minsik Kong, MyeongJun Kang, Gwangcheol Ji, Seonguk Park, Byeongcheol Choe, Jong Mok Ok*

Curr. Appl. Phys., 2024

19. The synthesis of β-Ti3O5 and λ-phase AlxTi3-xO5 with Arc melting method

Minsik Kong, Seohee Kim, Min Jae Kim, MyeongJun Kang, Gwangcheol Ji, Seonguk Park, Jisung Lee, Yeongjun Son, Sungkyun Park*, Jong Mok Ok*

New Physics:Sae Mulli, 2024

20. Synthesis and characterization of Pb10-xCux(PO4)6O polycrystalline samples

Huiwon Kim, Minsik Kong, Minjae Kim, Seohee Kim, Jong Mok Ok*

Progress in Superconductivity and Cryogenics, 2023

21. Theoretical investigation of delafossite-Cu2ZnSnO4 as a promising photovoltaic absorber

Seoung-Hun Kang†, Myeongjun Kang†, Sang Woon Hwang, Sinchul Yeom, Mina Yoon, Jong Mok Ok*, Sangmoon Yoon*

Nanomaterials, 2023

22. Exotic superconducting state under high magnetic fields: Insights from iron-based superconductor

Minjae Kim, Jong Mok Ok*

Progress in Superconductivity and Cryogenics, 2023

23. Exotic magnetic anisotropy near digitized dimensional Mott boundary

Seung Gyo Jeong†, Jihyun Kim†, Taewon Min†, Sehwan Song, Jinyoung Oh, Woo-suk Noh, Sungkyun Park, Tuson Park, Jong Mok Ok, Jaekwang Lee*, Woo Seok Choi*

Small, 2023

24. Thermodynamic Understanding of Impurity Phase Segregation in a PdCrO2/CuCrO2 Heterostructure

Tom Ichibha, Sangmoon Yoon, Jong Mok Ok, Mina Yoon, Ho Nyung Lee, Fernando A. Reboredo

Adv. Physics Res., 2023

25. Honeycomb oxide heterostructure proximity to Kitaev quantum spin liquid

Baekjune Kang†, Miju Park†, Seunghyun Noh, Daeseong Choe, Minjae Kim, Minsik Kong, Choongwon Seo, Eun Kyo Ko, Gangsan Yi, Jung-woo Yoo, Jong Mok Ok*, Changhee Sohn*

Phys. Rev. B., 2023

26. Growth of delafossite CuAlO2 single crystals in a reactive crucible

Du Hyung Kim, Minsik Kong, Myeongjun Kang, Minjae Kim, Seohee Kim, Youngwook Kim, Sangmoon Yoon, Jong Mok Ok*

J. Phys. Condens. Matter., 2023

27. Torque Magnetometry: Toward Measurement of Quantum Magnetism on Thin Film Heterostructures

Minsik Kong, Changhee Sohn, Jong Mok Ok*

J. Kor. Mag. Soc., 2022

28. Quantum transport signatures of isolated topological nodal-line fermions

Hoil Kim, Jong Mok Ok, Seyeong Cha, Bo Gyu Jang, Chang Il Kwon, Yoshimitsu Kohama, Koichi Kindo, Won Joon Cho, Eun Sang Choi, Youn Jung Jo, Woun Kang, Ji Hoon Shim, Keun Su Kim, Jun Sung Kim∗

Nat. Commun., 2022

29. Solid-phase epitaxy of a CuAlO2 template on c-Al2O3 for delafossite growth

Amanda Huon†, Jong Mok Ok†, Sangmoon Yoon, Andrew R. Lupini, Ho Nyung Lee*

APL Mater., 2022

30. Preparation of large Cu3Sn single crystal by Czochralski method

Minsik Kong†, Sang-Eon Park†, Hye Jung Kim†, Sehwan Song, Dong-Choon Ryu, Baekjune Kang, Changhee Sohn, Hyun Jung Kim, Youngwook Kim, Sangmoon Yoon, Ara Go, Hyoungjeen Jeen, Sungkyun Park, Se-Young Jeong, Chang-Jong Kang*, Jong Mok Ok*

J. Korean Phys. Soc., 2022

31. Recent Research Activities of Single-crystal Growth Groups in Korea

Kee Hoon KIM, Sung Wng KIM, Jun Sung KIM, Keeseong PARK, Yoon Seok OH, Jong Mok OK, Ki Moon LEE, Jong Su LEE, Myung Hwa JUNG, Se-Young JEONG, Kwang Yong CHOI, Young Jai CHOI

Physics and High Technology, 2022

32. Antiferromagnetic proximity coupling in heterostructured superconductor Sr2VO3FeAs

Jong Mok Ok†, Chang Il Kwon†, O. E. Ayala Valenzuela, Sunghun Kim, Ross D. McDonald, Jee Hoon Kim, E. S. Choi, Woun Kang, Y. J. Jo, C. Kim, E. G. Moon, Y. K. Kim, Jun Sung Kim*

Phys. Rev. B, 2022

33. Enhanced activation energy at a possible hidden antiferromagnetic phase in FeSe under pressure

Jihye Kim, Jong Mok Ok, Joonyoung Choi, Jun Sung Kim, Woun Kang, Younjung Jo*

Phys. Rev. B, 2022

34. Semi-Dirac and Weyl fermions in transition metal oxides

Narayan Mohanta, Jong Mok Ok, Jie Zhang, Hu Miao, Elbio Dagotto, Ho Nyung Lee, Satoshi Okamoto

Phys. Rev. B, 2021

35. Band-selective gap opening by a C4-symmetric order in a proximity-coupled heterostructure Sr2VO3FeAs

Sunghun Kim†, Jong Mok Ok†, Hanbit Oh, Chang-il Kwon, Y. Zhang, J. D. Denlinger, S.-K. Mo, F. Wolff-Fabris, E. Kampert, Eun-Gook Moon*, C. Kim*, Jun Sung Kim*, Y. K. Kim*

PNAS, 2021

36. Extremely large magnetoresistance in high-mobility SrNbO3/SrTiO3 heterostructures

Jie Zhang†, Jong Mok Ok†, Yun-Yi Pai, Jason Lapano, Elizabeth Skoropata, Alessandro R. Mazza, Haoxiang Li, Amanda Huon, Sangmoon Yoon, Benjamin Lawrie, Matthew Brahlek, T. Zac Ward, Gyula Eres, H. Miao, Ho Nyung Lee*

Phys. Rev. B, 2021

37. Effects of Sn substitution in SrRuO3 epitaxial films

Amanda Huon, Sangmoon Yoon, Michael Fitzsimmons, Timothy Charlton, Jong Mok Ok, Clarina dela Cruz, Ho Nyung Lee

Appl. Phys. Lett., 2021

38. Correlated oxide Dirac semimetal in the extreme quantum limit

Jong Mok Ok†, Jie Zhang†, Narayan Mohanta†, Sangmoon Yoon, Satoshi Okamoto, Eun Sang Choi, H. Zhou, Andrew R. Lupini, Yun-Yi Pai, Elizabeth Skoropata, Changhee Sohn, Woo Seok Choi, Megan Briggeman, Patrick Irvin, Jeremy Levy, Ho Nyung Lee*

Sci. Adv., 2021

39. A STEM/EELS study of interfaces in delafossite-based quantum heterostructures

Sangmoon Yoon, Jong Mok Ok, Mina Yoon, Sinchul Yeom, Tomohiro Ichiba, Fernando A Reboredo, Amanda Huon, Andrew R Lupini, Ho Nyung Lee

Microscopy and Microanalysis, 2021

40. Ferromagnetic structural units in strained LaCoO3 thin films

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

Nano Lett., 2021

41. Twin domain formation in epitaxial triangular lattice delafossites

Jong Mok Ok†, Sangmoon Yoon†, Andrew R. Lupini, Panchapakesan Ganesh, Matthew F. Chisholm, Ho Nyung Lee*

ACS Applied Materials & Interfaces, 2021

42. Strain synthesis, inserting and directing atoms in matter

Changhee Sohn, Xiang Gao, Rama K. Vasudevan, Sabine M. Neumayer, Nina Balke, Jong Mok Ok, Dongkyu Lee, Elizabeth Skoropata, Hu Young Jeong, Young-Min Kim, Ho Nyung Lee*

Sci. Adv., 2021

43. Atomic Structure of the Initial Nucleation Layer in Hexagonal Perovskite BaRuO3 Thin films

Sangmoon Yoon, Jong Mok Ok, Sang A Lee, Jegon Lee, Amanda Houn, Andrew Lupini, Woo Seok Choi*, Ho Nyung Lee*

Adv. Mater. Interfaces, 2021

44. Post-synthesis Berry phase engineering in SrRuO3 films

Elizabeth Skoropata, Alessandro Mazza, Andreas Herklotz, Jong Mok Ok, Gyula Eres, Matthew Brahlek, Ho Nyung Lee, Thomas Zac Ward*

Phys. Rev. B, 2021

45. 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, Sangmoon Yoon, Se-Jeong Park, Sehwan Song, Jong-Seong Bae, Sungkyun Park, Ho Nyung Lee, Woo Seok Choi*

Adv. Electronic. Mater., 2021

For publications prior to 2021, please use the link below: Google scholar link

1. [국내 10-2025-0177960] 극저온에서 전도 메커니즘 변화에 따라 자기장에 의해 전류 전달 특성이 제어되는 자기장 감응형 베타 산화갈륨 반도체 소자 및 이의 제조방법

2. [국내 10-2025-0178370] 이종접합 구조체, 산화갈륨 상에 CuGaO2 박막 제조 방법, 수직 구조 p-n 이종접합 다이오드 제조방법, 이에 의해 제조된 수직 구조 p-n 이종접합 다이오드 및 이를 포함하는 수직 구조 p-n 이종접합 다이오드 소자

3. [국내 10-2025-0177955] 기판의 표면 미세 특이 구조 형성을 통한 (100) 산화갈륨 박막의 증착률 향상을 위한 박막 성장 전처리 방법 및 이를 이용한 (100) 산화갈륨 박막 증착 방법

4. [국내 10-2025-0059501] 초고온용 내화재 및 이의 제조방법

5. [국내 10-2025-0017476] 과도 열 유속법을 이용하여 시편의 열 용량을 측정하기 위한 열 용량 측정 장치 및 방법

6. [국내 10-2025-0006140] 상전이 특성 제어 가능한 이산화바나듐 제조방법 및 이에 따라 제조된 이산화바나듐 [기술이전]

7. [중국 202510428782.7] APPARATUS FOR MANUFACTURING OXIDE SINGLE CRYSTALS, METHOD FOR PRODUCING GALLIUM OXIDE SINGLE CRYSTALS USING THE APPARATUS AND GALLIUM OXIDE SINGLE CRYSTALS THEREBY

8. [유럽 EP25170937.4] APPARATUS FOR PRODUCING OXIDE SINGLE CRYSTAL, METHOD FOR PRODUCING GALLIUM OXIDE SINGLE CRYSTALS USING THE APPARATUS, AND GALLIUM OXIDE SINGLE CRYSTAL PRODUCED THEREBY

9. [일본 P25323K-JP] APPARATUS FOR PRODUCING OXIDE SINGLE CRYSTAL, METHOD FOR PRODUCING GALLIUM OXIDE SINGLE CRYSTALS USING THE APPARATUS, AND GALLIUM OXIDE SINGLE CRYSTAL PRODUCED THEREBY

10. [미국 19/173,879] APPARATUS FOR PRODUCING OXIDE SINGLE CRYSTAL, METHOD FOR PRODUCING GALLIUM OXIDE SINGLE CRYSTALS USING THE APPARATUS, AND GALLIUM OXIDE SINGLE CRYSTAL PRODUCED THEREBY

11. [국내 10-2024-0167299] 산화물 단결정 제조 장치, 이 장치를 이용한 산화갈륨 단결정 제조방법 및 이에 따라 제조된 산화갈륨 단결정

12. [국내 10-2024-0191132] A15 구조를 가지는 Ti3Sb 단결정 및 이의 제조 방법

13. [국내 10-2023-0136333] 유도가열용 숯, 유도가열용 숯 제조방법 및 숯 착화장치 [기술이전]

14. [국내 10-2023-0078806] 테트라 아크 용해법을 이용한 산화티타늄 제조장치 및 이를 활용한 산화티타늄 제조 방법 [기술이전]

1. [10-2881924/10-2023-0075738] 산화티타늄 제조장치 및 이 장치를 이용한 산화티타늄 제조방법 

2. [10-2755956/10-2023-0092198] 육방정계 구조를 가지는 Ni3Sn 단결정및 그 제조 방법 

3. [10-2819218/10-2024-0073380] 낱알 경계가 억제된 2차원 단결정 박막에서의 비선형 홀효과 및 홀 수송자 지배적 수송현상을 포함하는 단결정 구리 박막 제조방법 및 이를 이용하여 제조된 단결정 구리박막 및 단결정 구리박막 반도체