Work

Floquet topological phases with time-reversal and space-inversion symmetries and dynamical detection of topological charges

Year: 2024

Type: article

Abstract: For spinful systems with spin 1/2, it is generally believed that $\mathcal{P}$ and $\mathcal{T}$ invariant strong and second-order topologies exist in four band and eight band systems, respectively. Here, by using periodic driving, we find it is possible to have a strong topological insulator, a second-order topological insulator, and a hybrid-order topological insulator in a single four band system. Furthermore, we established a direct connection between topology and dynamics. More convenient experimental detection for these topological phases has also been proposed. This study provides the theoretical basis for a topological insulator that possess hybrid-order boundary states beyond the conventional regimes.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.235140

Authors: Hong Wu, Yu-Chen Dong, Hui Liu

Institutions: Chongqing University of Posts and Telecommunications, Stockholm University

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Chongqing Municipal Education Commission Foundation, National Natural Science Foundation of China

Awards: G7548241182, G8336376251