2 papers
cond-mat.str-el2026
Electronic Toroidal Metals: Landau Theory and Magnetoelectric Fingerprints
Yuhang Xiao, Ning Hao
Toroidal order is a higher-rank multipolar order whose intrinsic realization in itinerant-electron systems remains unexplored. Here, we develop a generic theory of the electronic t…
cond-mat.supr-con2024
Quantum Geometric Effects on the Higgs Mode in Flat-band Superconductors
Yuhang Xiao, Ning Hao
Flat-band systems are of great interest due to their strong electron correlations and unique band geometry. Recent studies have linked the properties of Cooper pairs in flat-band s…