3 papers
cond-mat.mes-hall2026
Quaternion-Kahler geometry of time reversal symmetric crystals
Hyeongmuk Lim, Junseo Jung, Yuting Qian +1
Quantum geometry reveals how the shape of Bloch wave functions governs correlated quantum phenomena. Its standard formulation describes isolated complex bands, where Berry curvatur…
cond-mat.mes-hall2024
Unconventional topological phase transition of the Hopf insulator
Sunje Kim, Ysun Choi, Hyeongmuk Lim +1
The topological phase transition between two band insulators is mediated by a gapless state whose low-energy band structure normally contains sufficient information for describing…
cond-mat.mes-hall2023
Quantum Geometry and Landau Levels of Quadratic Band Crossings
Junseo Jung, Hyeongmuk Lim, Bohm-Jung Yang
We study the relation between the quantum geometry of wave functions and the Landau level (LL) spectrum of two-band Hamiltonians with a quadratic band crossing point (QBCP) in two-…