- Correlated materials, topological materials & unconventional superconductors
- Electronic structure studies by angle resolved photoemission
- Orbital physics

1994.09 ~ 2001.07 Visiting Physicist, Stanford Synchrotron Radiation Lab
2001.09 ~ 2015.08 Assistant/Associate/Full professor, Yonsei University
2015.09 ~ present Professor, Seoul National University
2015.09 ~ present Associate director, IBS Center for Correlated Electron Systems, Seoul National University
2012.05 ~ 2015.05 Review board member, National Research Foundation
2013.01 ~ 2014.12 Academic director, Korean Physical Society
2017.01 ~ present Vice president, Korean Society of Superconductivity & Cryogenics
2019.01 ~ 2020.12 Vice president (academic affairs), Korean Physical Society

2017 Scientist/engineer of the month award, Ministry of Science and ICT
2018 Academic award, Korean Physical Society
2020 Presidential Commendation, Ministry of Science and ICT