SangEun Han,
Junhyun Lee,
Eun-Gook Moon
Phys. Rev. B 103, 014435 (2021) (
arXiv:1911.01435)
"Emergent Anisotropic Non-Fermi Liquid at a Topological Phase Transition in Three Dimensions"
"Quantum criticality with infinite anisotropy in topological phase transitions between Dirac and Weyl semimetals"
"Long-range Coulomb Interaction effects on Topological Phase Transitions between Semi-metals and Insulators"
SangEun Han and
Eun-Gook Moon
Phys. Rev. B 97, 241101(R) (2018) (
arXiv:1802.05727)
Chiral symmetry is one of the most fundamental symmetries in nature, which prohibits mass generation of fermions. Remarkable advances in topological matter reveal the chiral symmetry may be realized as lattice symmetries of topological state. A topological phase transition is intrinsically tied to breaking a chiral symmetry. The topological transition, however, is lack of the Lorentz symmetry in contrast to particle physics. In particular, the Coulomb interaction is instantaneous, and it is imperative to understand its effects on chiral symmetry breaking transitions. Thus, we investigate long-range Coulomb interaction effects on topological phase transitions and find striking properties with novel scaling functions.
"Topological Phase Transitions in Line-nodal Superconductors"
We study the topological phase transition accompanied by the change in the topological nodal structure. The nodal fermionic excitation induces a novel universality class which is characterized by the hyperscaling violation, emergent relativistic scale, and large anomalous dimensions. We propose that the unusual linear phase boundary as a signal of the underlying line-nodal fermions.
"Explaining the Lepton Non-universality at the LHCb and CMS from an Unified Framework"
Sanjoy Biswas, Debtosh Chowdhury,
SangEun Han, and Seung J. Lee
JHEP 02, 142 (2015) (
arXiv:1409.0882)
Academic Affiliations
- Department of Physics, University of Toronto
November 2020 ~ Present
Postdoctoral Fellow
- School of Computational Sciences, KIAS
August 2020 ~ October 2020
Visiting Scholar
- Department of Physics, KAIST
March 2013 ~ August 2020
Candidate of Integrated Master's and Ph.D Program
Quantum Matter Workshop (Poster)
November 2022
2022 CAP congress (Talk)
June 2022
APS March Meeting 2022 (Talk)
March 2022
(Virtual) APS March Meeting 2020 (Talk)
March 2020
12th BK21+ Young Physicists Workshop (Talk)
February 2020
2019 KPS Fall Meeting (Talk)
October 2019
APS March Meeting 2019 (Talk)
March 2019
11th BK21+ Young Physicists Workshop (Talk)
February 2019
APS March Meeting 2018 (Talk)
March 2018
APS March Meeting 2017 (Talk)
March 2017
2018 KPS Spring Meeting (Talk)
April 2018
2017 KPS Spring Meeting (Talk)
April 2017
IBSPCS-KIAS International Workshop Frustrated Magnetism (Poster)
October 2019
The 2nd Workshop on Spin-Orbit Coupled Topological States (Poster)
September 2019
KIAS workshop on Topology and Correlation in quantum materials (Poster)
May 2019
The 19th JAPAN-KOREA-TAIWAN SYMPOSIUM ON STRONGLY CORRELATED ELECTRON SYSTEMS (Poster)
January 2019
The 1st Workshop on Spin-Orbit Coupled Topological States (Poster)
October 2018
Advanced School and Workshop on Correlations in Electron Systems - from Quantum Criticality to Topology - (Poster)
August 2018
International Workshop on "New Paradigms in Quantum Matter 2018" (Poster)
June 2018
KIAS workshop on Topology and Correlation (Poster)
June 2018
10th BK21+ Young Physicists Workshop (Poster)
Feburary 2018
The 19th International Conference on Recent Progress in Many-Body Theories (Poster)
June 2017
2016 Quantum Materials Symposium (Poster)
Feburary 2016