PUBLICATIONS

45. 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, Correlated oxide Dirac semimetal in the extreme quantum limit, Sci. Adv. 7, abf9631 (2021).

44. 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, Strain-driven autonomous control of cation distribution for artificial ferroelectrics, Sci. Adv. 7, eabd7394 (2021).

43. Gene Yang, So-Yeun Kim, Changhee Sohn, Jong K Keum, Dongkyu Lee, Influence of Heterointerfaces on the Kinetics of Oxygen Surface Exchange on Epitaxial La1. 85Sr0. 15CuO4 Thin Films, Appl. Sci. 11, 3778 (2021)

42. Gyula Eres, Shinbuhm Lee, John Nichols, Changhee Sohn, Jong Mok Ok, Alessandro R Mazza, Chenze Liu, Gerd Duscher, Ho Nyung Lee, Daniel E McNally, Xingye Lu, Milan Radovic, Thorsten Schmitt, Adv. Funct. Mater. 30, 2004914 (2020)

41. Qiyang Lu, Changhee Sohn, Guoxiang Hu, Xiang Gao, Matthew F Chisholm, Ilkka Kylänpää, Jaron T Krogel, Paul RC Kent, Olle Heinonen, P Ganesh, Ho Nyung Lee, Metal–insulator transition tuned by oxygen vacancy migration across TiO 2/VO 2 interface, Sci. Rep. 10, 1-7 (2020)

40. Shinbuhm Lee, Xiang Gao, Changhee Sohn, Youngkyoung Ha, Sangmoon Yoon, Jong Mok Ok, Matthew F Chisholm, Tae Won Noh, Ho Nyung Lee, Templated epitaxy of TiO2(B) on a perovskite, Appl. Phys. Lett. 117, 133903 (2020)

39. Elizabeth Skoropata, John Nichols, Jong Mok Ok, Rajesh V Chopdekar, Eun Sang Choi, Ankur Rastogi, Changhee Sohn, Xiang Gao, Sangmoon Yoon, Thomas Farmer, Ryan D Desautels, Yongseong Choi, Daniel Haskel, John W Freeland, Satoshi Okamoto, Matthew Brahlek, Ho Nyung Lee, Interfacial tuning of chiral magnetic interactions for large topological Hall effects in LaMnO3/SrIrO3 heterostructures, Sci. Adv. 6, eaaz3902 (2020)

38. Friederike Wrobel, Hyowon Park, Changhee Sohn, Haw-Wen Hsiao, Jian-Min Zuo, Hyeondeok Shin, Ho Nyung Lee, Panchapakesan Ganesh, Anouar Benali, Paul RC Kent, Olle Heinonen, Anand Bhattacharya, Doped NiO: The mottness of a charge transfer insulator, Phys. Rev. B 101, 195128 (2020)

37. Jong Mok Ok, Matthew Brahlek, Woo Seok Choi, Kevin M Roccapriore, Matthew F Chisholm, Soyeun Kim, Changhee Sohn, Elizabeth Skoropata, Sangmoon Yoon, Jun Sung Kim, Ho Nyung Lee, Pulsed-laser epitaxy of metallic delafossite PdCrO2 films, APL Mat. 8, 051104 (2020)

36. Yujun Zhang, Minjae Kim, Jernej Mravlje, Changhee Sohn, Yongseong Choi, Joerg Strempfer, Yasushi Hotta, Akira Yasui, John Nichols, Ho Nyung Lee, Hiroki Wadati, Photoemission and dynamical mean field theory study of electronic correlations in a t2g metal SrRhO3 thin film, Phys. Rev. B 101, 085134 (2020)

35. Andreas Herklotz, Stefania F Rus, Changhee Sohn, KC Santosh, Valentino R Cooper, Er-Jia Guo, Thomas Z Ward, Optical response of  BiFeO3 films subjected to uniaxial strain, Phys. Rev. Mat. 3, 094410 (2019)

34. Ankur Rastogi, Matthew Brahlek, Jong Mok Ok, Zhaoliang Liao, Changhee Sohn, Samuel Feldman, Ho Nyung Lee, Metal-insulator transition in (111) SrRuO3 ultrathin films, APL Mat. 7, 091106 (2019)

33. Yogesh Sharma, Martin V Holt, Nouamane Laanait, Xiang Gao, Ilia N Ivanov, Liam Collins, Changhee Sohn, Zhaoliang Liao, Elizabeth Skoropata, Sergei V Kalinin, Nina Balke, Gyula Eres, Thomas Z Ward, Ho Nyung Lee, Competing phases in epitaxial vanadium dioxide at nanoscale, APL Mat. 7, 081127 (2019)

32. Min-Cheol Lee, Choong H Kim, Inho Kwak, CW Seo, Changhee Sohn, F Nakamura, C Sow, Y Maeno, E-A Kim, TW Noh, KW Kim, Strong spin-phonon coupling unveiled by coherent phonon oscillations in Ca2RuO4, Phys. Rev. B 99, 144306 (2019)

31. J. Son, B. C. Park, C. H. Kim, H. Cho, S. Y. Kim, L. J. Sandilands, C. H. Sohn, J.-G. Park, S. J. Moon, and T. W. Noh, Unconventional spin-phonon coupling via the Dzyaloshinskii–Moriya interaction, npj Quantum Mat. 4, 17 (2019)

30. Z. Liao, E. Skoropata, J. W. Freeland, E.-J. Guo, R. Desautels, X. Gao, C. H. Sohn, A. Rastogi, T. Z. Ward, T. Zou, T. Charlton, M. R. Fitzsimmons, and H. N. Lee1, Large orbital polarization in nickelate-cuprate heterostructures by dimensional control of oxygen coordination, Nat. Commun. 10, 589 (2019)

29. C. H. Sohn, E. Skoropata, Y. Choi, X. Gao, A. Rastogi, A. Huon, M. A. McGuire, L. Nuckols, Y. Zhang, J. Freeland, D. Haskel, and H. N. Lee, Room-temperature ferromagnetic insulating state in highly cation-ordered double perovskite Sr2Fe1+xRe1-xO6 films, Adv. Mat. 31, 1805389 (2019).

28. E.-J. Guo, Y. Liu, C. H. Sohn, A. Herklotz, Z. Liao, R. D. Desautels, J. Nichols, J. W. Freeland, M. R. Fitzsimmons, and H. N. Lee, Oxygen Diode Formed in Nickelate Heterostructures by Chemical Potential Mismatch, Adv. Mat. 30, 1705904 (2018).

27. S. Y. Kim, M.-C. Lee, G. Han, M. Kratochvilova, S. Yun, C. H. Sohn, S. J. Moon, J.-G. Park, C. Kim, and T. W. Noh, Spectroscopic Studies on the Metal–Insulator Transition Mechanism in Correlated Materials, Adv. Mat., 1704777 (2018).

26. Y. Sharma, J. Balachandran, C. H. Sohn, J. T. Krogel, P. Ganesh, L. Collins, Q. Li, N. Balke, S. Kalinin, O. Heinonen, and H. N. Lee, Nanoscale control of metal-insulator transition in epitaxial vanadium dioxides, ACS Nano 12, 7159 (2018).

25. R. Agarwal, Y. Sharma, S. Chang, K. Pitike, C. H. Sohn, S. M. Nakhmanson, C. Takoudis, H. N. Lee, J. F. Scott, R. S. Katiyar, and S. Hong, Room-temperature relaxor ferroelectricity and photovoltaic effects in SnTiOx/Si thin film heterostructures, Phys. Rev. B 97, 054109 (2018).

24. T. L. Meyer, R. Jacobs, D. Lee, L. Jiang, J. W. Freeland, C. H. Sohn, T. Egami, D. Morgan, and H. N. Lee, Strain control of oxygen kinetics in Ruddlesden-Popper oxides, Nat. Commun., 9, 92 (2018).

23. T. M. H. Nguyen, L. J. Sandilands, C. H. Sohn, C. H. Kim, A. L. Wysocki, I.-S. Yang, S. J. Moon, J.-H. Ko, J. Yamaura, Z. Hiroi, and T. W. Noh, Two-magnon scattering in the 5d all-in-all-out pyrochlore magnet Cd2Os2O7, Nat. Commun., 8, 251 (2017).

22. D. Lee, R. Jacobs, Y. Jee, S. S. A. Seo, C. H. Sohn, A. V. Ievlev, O. S. Ovchinnikova, K. Huang, D. Morgan, and H. N. Lee, Stretching Epitaxial La0.6Sr0.4CoO3-δ for Fast Oxygen Reduction, J. Phys. Chem. C 121, 25651 (2017).

21. J. Nichols, S. F. Yuk, C. H. Sohn, H. Jeen, J. W. Freeland, V. R. Cooper, and H. N. Lee, Electronic and magnetic properties of epitaxial SrRhO3 films, Phys. Rev. B 95, 245121 (2017).

20. S. Okamoto, J. Nichols, C. H. Sohn, S. Y. Kim, T. W. Noh, and H. N. Lee, Charge transfer in iridate-manganite superlattices, Nano Lett. 17, 2126 (2017).

19. C. H. Sohn, C. H. Kim, L. J. Sandilands, N. T. M. Hien, S. Y. Kim, H. J. Park, K.W. Kim, S. J. Moon, J. Yamaura, Z. Hiroi, and T. W. Noh, Strong spin-phonon coupling mediated by single ion anisotropy in the all-in–all-out pyrochlore magnet Cd2Os2O7, Phys. Rev. Lett. 118, 117201 (2017).

18. S. Y. Kim, C. H. Kim, L. J. Sandilands, C. H. Sohn, J. Matsuno, H. Takagi, K. W. Kim, Y. S. Lee, S. J. Moon, and T. W. Noh, Manipulation of electronic structure via alteration of local orbital environment in [(SrIrO3)m,(SrTiO3)](m = 1, 2,and ∞) superlattices, Phys. Rev. B 94, 245113 (2016).

17. L. J. Sandilands, C. H. Sohn, H. J. Park, S. Y. Kim, K. W. Kim, J. A. Sears, Y.-J. Kim, and T. W. Noh, Optical probe of Heisenberg-Kitaev magnetism in alpha-RuCl3, Phys. Rev. B 94, 195156 (2016).

16. C. H. Sohn, D.-Y. Cho, C. T. Kuo, L. J. Sandilands, T. F. Qi, G. Cao, and T. W. Noh, X-ray absorption spectroscopy study of the effect of Rh doping in Sr2IrO4, Sci. Rep. 6, 23856 (2016).

15. W. J. Kim, S. Y. Kim, C. H. Kim, C. H. Sohn, O. B. Korneta, S. C. Chae, and T. W. Noh, Spin-orbit coupling induced band structure change and orbital character of epitaxial IrO2 film, Phys. Rev. B 93, 045104 (2016).

14. H. J. Park, L. J. Sandilands, J. S. You, H. S. Ji, C. H. Sohn, J. W. Han, S. J. Moon, K. W. Kim, J. H. Shim, J. S. Kim, and T. W. Noh, Thermally activated heavy states and anomalous optical properties in a multiband metal: The case of SrMnSb2, Phys. Rev. B 93, 205122 (2016).

13. H. K. Yoo, S. I. Hyun, Y. J. Chang, L. Moreschini, C. H. Sohn, H. D. Kim, A. Bostwick, J. H. Shim, and T. W. Noh, Thickness-dependent electronic structure in ultrathin LaNiO3 films under tensile strain, Phys. Rev. B 93, 035141 (2016).

12. S. B. Lee, T. Meyer, C. H. Sohn, D. H. Lee, J. Nichols, D. K. Lee, S. S. A. Seo, J. W. Freeland, T. W. Noh, and H. N. Lee, Electronic structure and insulating gap in epitaxial VO2 polymorphs, APL Mat. 3, 126109 (2015).

11. C. H. Sohn, H. G. Jeong, H. Jin, S. Y. Kim, L. J. Sandilands, H. J. Park, K. W. Kim, S. J. Moon, D.-Y. Cho, J. Yamaura, Z. Hiroi, and T. W. Noh, Optical spectroscopy studies of the Metal-insulator transition driven by all-in/all-out magnetic ordering in 5d pyrochlore Cd2Os2O7, Phys. Rev. Lett. 115, 266402 (2015).

10. M. -C. Lee, C. H. Sohn, S. Y. Kim, K. D. Lee, C. J. Won N. Hur, J. Y. Kim, D. -Y. Cho, and T. W. Noh, Stabilization of ferromagnetic ordering in cobaltite double perovskites of La2CoIrO6 and La2CoPtO6, J. Phys.: Condens. Matter 27, 336002 (2015).

9. H. K. Yoo, Y. J. Chang, L. Moreschini, H. D. Kim, C. H. Sohn, S. Sinn, J. S. Oh, C. T. Kuo, A. Bostwick, E. Rotenberg, and T. W. Noh, Insulating-layer formation of metallic LaNiO3 on Nb-doped SrTiO3 substrates, Appl. Phys. Lett. 106, 121601 (2015).

8. H. K. Yoo, S. I. Hyun, L. Moreschini, H. D. Kim, Y. J. Chang, C. H. Sohn, D. W. Jeong, S. Sinn, Y. S. Kim, A. Bostwick, E. Rotenberg, J. H. Shim, and T. W. Noh, Latent instabilities in metallic LaNiO3 films by strain control of Fermi-surface topology, Sci. Rep. 5, 8746 (2015).

7. C. H. Sohn, M. C. Lee, H. J. Park, K. J. Noh, H. K. Yoo, S. J. Moon, K. W. Kim, T. F. Qi, G. Cao, D.-Y. Cho, and T. W. Noh, Orbital-dependent polaron formation in the relativistic Mott insulator Sr2IrO4, Phys. Rev. B 90, 041105(R) (2014), selected by editor’s suggestion.

6. Y. Kang, S. Lee, H. Sim, C. H. Sohn, W. G. Park, S. J. Song, U. K. Kim, C. S. Hwang, S. Han and D.-Y. Cho, The impact of orbital hybridization on the electronic structure of crystalline InGaZnO: a new perspective on the compositional dependence, J. Mat. Chem. C 2, 9196 (2014).

5. H. J. Park, C. H. Sohn, D. W. Jeong, G. Cao, K. W. Kim, S. J. Moon, H. Jin, D.-Y. Cho, T. W. Noh, Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7, Phys. Rev. B 89, 155115 (2014).

4. Y. S. Kim, J. Kim, M. J. Yoon, C. H. Sohn, S. B. Lee, D. Lee, B. C. Jeon, H. K. Yoo, T. W. Noh, A. Bostwick, E. Rotenberg, J. Yu, S. D. Bu, and B. S. Mun, Impact of vacancy clusters on characteristic resistance change of nonstoichiometric strontium titanate nano-film, Appl. Phys. Lett. 104, 013501 (2014).

3. C. H. Sohn, H.-S. Kim, T. F. Qi, D. W. Jeong, H. J. Park, H. K. Yoo, H. H. Kim, J.-Y. Kim, T. D. Kang, D.-Y. Cho, G. Cao, J. Yu, S. J. Moon, and T. W. Noh, Mixing between Jeff = 1/2 and 3/2 orbitals in Na2IrO3: A spectroscopic and density functional calculation study, Phys. Rev. B 88, 085125 (2013).

2. D. W. Jeong, H. C. Choi, C. H. Kim, S. H. Chang, C. H. Sohn, H. J. Park, T. D. Kang, D.-Y. Cho, S.H. Baek, C. B. Eom, J. H. Shim, J. Yu, K. W. Kim, S. J. Moon, and T. W. Noh, Temperature Evolution of Itinerant Ferromagnetism in SrRuO3 Probed by Optical Spectroscopy, Phys. Rev. Lett 110, 247202 (2013).

1. D. W. Jeong, W. S. Choi, T. D. Kang, C. H. Sohn, A. David, H. Rotella, A. A. Sirenko, C. H. Lee, J. H. Kim, U. Luders, W. Prellier, Y.-J. Kim, Y. S. Lee, and T. W. Noh, Optical spectroscopy of the carrier dynamics in LaVO3/SrVO3 superlattices, Phys. Rev. B 84, 115132 (2011).