52 citations · 52 across the 2 of their papers we have counts for
11 papers
Multi-gap topology of the Wilson loop operator in mirror symmetric insulators
Penghao Zhu, Taylor L. Hughes, Xiao-Qi Sun
We study the multi-gap topology of the periodic spectra of Wilson loop operators (WLOs) in mirror symmetric insulators. We develop two topological invariants each associated with a…
Geometric Response and Disclination-Induced Skin Effects in Non-Hermitian Systems
Xiao-Qi Sun, Penghao Zhu, Taylor L. Hughes
We study the geometric response of three-dimensional non-Hermitian crystalline systems with nontrivial point-gap topology. For systems with fourfold rotation symmetry, we show that…
Topological Classification of Non-Hermitian Hamiltonians
Charles C. Wojcik, Xiao-Qi Sun, Tomáš Bzdušek +1
We revisit the problem of classifying topological band structures in non-Hermitian systems. Recently, a solution has been proposed, which is based on redefining the notion of energ…
-Symmetric Topological Edge-Gain Effect
Alex Y. Song, Xiao-Qi Sun, Avik Dutt +6
We demonstrate a non-Hermitian topological effect that is characterized by having complex eigenvalues only in the edge states of a topological material, despite the fact that the m…
Enhanced thermal Hall effect in nearly ferroelectric insulators
Jing-Yuan Chen, Steven A. Kivelson, Xiao-Qi Sun
In the context of recent experimental observations of an unexpectedly large thermal Hall conductivity, , in insulating (LCO) and (STO),…
Alice string in Non-Hermitian Systems
Xiao-Qi Sun, Charles C. Wojcik, Shanhui Fan +1
Alice string is a topological defect with a very peculiar feature. When a defect with a monopole charge encircles an Alice string, the monopole charge changes sign. In this work, w…