5 papers
Generalized Space Groups from Internal Configuration Spaces
Zeying Zhang, Zhenye Li, Zhi-Ming Yu +2
We develop a unified construction of generalized space groups for crystals with unconventional internal degrees of freedom. Starting from the full group of allowed internal t…
Identifying topological excitonic insulators via bulk-edge correspondence
Hongwei Qu, Zeying Zhang, Yuanchang Li
Excitonic insulator remains elusive and there has been a lack of reliable identification methods. In this work, we demonstrate the promise of topological excitonic insulators for i…
Sliding Ferroelectrics Induced Hybrid-Order Topological Phase Transitions
Ning-Jing Yang, Jian-Min Zhang, Xiao-Ping Li +4
We propose ferroelectric layer sliding as a new approach to realize and manipulate topological quantum states in two-dimensional (2D) bilayer magnetic van der Waals materials. We s…
Essentially degenerate hidden nodal lines in two-dimensional magnetic layer groups
Xiao-Ping Li, Chaoxi Cui, Lei Wang +4
According to the theory of group representations, the types of band degeneracy can be divided into accidental degeneracy and essential degeneracy. The essentially degenerate nodal…
Cornertronics in Two-Dimensional Second-Order Topological Insulators
Yilin Han, Chaoxi Cui, Xiao-Ping Li +4
Traditional electronic devices rely on the electron's intrinsic degrees of freedom (d.o.f.) to process information. However, additional d.o.f. like the valley, can emerge in the lo…