4 papers
Lattice vibration as a knob for novel quantum criticality: Emergence of supersymmetry from spin-lattice coupling
SangEun Han, Junhyun Lee, Eun-Gook Moon
Control of quantum coherence in many-body system is one of the key issues in modern condensed matter. Conventional wisdom is that lattice vibration is an innate source of decoheren…
Emergent Anisotropic Non-Fermi Liquid at a Topological Phase Transition in Three Dimensions
SangEun Han, Changhee Lee, Eun-Gook Moon +1
Understanding correlation effects in topological phases and their transitions is a cutting-edge area of research in recent condensed matter physics. We study topological quantum ph…
Quantum Criticalities with Infinite Anisotropy in Topological Phase Transitions between Dirac and Weyl Semi-metals
SangEun Han, Gil Young Cho, Eun-Gook Moon
We study quantum phase transitions (QPTs) associated with splitting nodal Fermi points, motivated by topological phase transitions between Dirac and Weyl semi-metals. A Dirac point…
Long-range Coulomb Interaction effects on Topological Phase Transitions between Semi-metals and Insulators
SangEun Han, Eun-Gook Moon
Topological states may be protected by a lattice symmetry in a class of topological semi-metals. In three spatial dimensions, the Berry flux around gapless excitations in momentum…