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cond-mat.mes-hall2026
Hidden topology and strong quantum metric bounds in trivial systems
Chang-An Li, Yulin Qin, Bo Fu +1
The quantum metric integral (QMI) in two-dimensional (2D) systems is conventionally bounded from below by the Chern number. For systems with zero Chern number or identically vanish…
cond-mat.mes-hall2025★ 2 cited
Marginal Metals and Kosterlitz-Thouless Type Phase Transition in Disordered Altermagnets
Chang-An Li, Bo Fu, Huaiming Guo +2
Altermagnetism, a recently discovered magnetic phase characterized by spin-split bands without net magnetization, has emerged as promising platform for novel physics and potential…
cond-mat.mes-hall2024★ 4 cited
Random-Flux-Induced Transition Sequence between Weak and Strong Topological Phases with Anisotropic Localization Properties
Chang-An Li, Bo Fu, Jian Li +1
We demonstrate that random flux is able to drive nontrivial topological phase transitions, in particular between weak topological insulators (WTIs) and Chern insulators (CIs), illu…