3 papers
quant-ph2022
Bloch band structures and linear response theory of nonlinear systems
Fude Li, Junjie Wang, Dianzhen Cui +2
We investigate the Bloch bands and develop a linear response theory for nonlinear systems, where the interplay between topological parameters and nonlinearity leads to new band str…
cond-mat.mes-hall2021
Hall conductance of a non-Hermitian two-band system with k-dependent decay rates
Junjie Wang, Fude Li, X. X. Yi
Two-band model works well for Hall effect in topological insulators. It turns out to be non-Hermitian when the system is subjected to environments, and its topology characterized b…
quant-ph2020
Nonlinear Dirac Points and topological invariant in coupled hexagonal lattices
Fude Li, X. X. Yi
Topological phases and materials have attracted much attention in recent years. Though many progress has been made, the effect of nonlinearity on such system remains untouched. In…