Work

Topological defects and higher Chern number two-band structures on checkerboard lattice

Year: 2025

Type: article

Abstract: In this paper, we focus on studying the meron defects on checkerboard lattice based on two-band structures. Merons are two-dimensional point defects, whose topological charges give the evaluations of the Chern numbers of the two bands. We first reproduce the results of a previous model from the defect perspective. Then, the model is extended to attain the higher Chern number systems. We show that the model can achieve C = ± 3 structures through analyzing the charges of the merons. The energy spectrum also reveals that three gap-closed states appear on the edges.

Source: Reviews in Physics

DOI: 10.1016/j.revip.2025.100113

Authors: Zhi-Wen Chang, Wei-Chang Hao, Xin Liu

Institutions: Suzhou Vocational University, Beihang University, Beijing University of Technology

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,050

Funders: National Natural Science Foundation of China, Natural Science Foundation of Beijing Municipality