Disorder-induced phase transitions in a two-dimensional magnetic topological insulator system

被引：0

作者：

Song, Yong-Liang ^{[1
]}

Shang, Shu-xiu ^{[1
]}

Chen, Xin-lian ^{[1
]}

Zhang, Chang-wen ^{[1
]}

Zhang, Shu-feng ^{[1
]}

机构：

[1] Univ Jinan, Sch Phys & Technol, Jinan 250022, Shandong, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2025年 / 37卷 / 09期

基金：

中国国家自然科学基金;

关键词：

disorder; phase transition; topological insulator; LOCALIZATION;

D O I：

10.1088/1361-648X/ad9fc9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We investigate the phase diagram of a two-dimensional magnetic topological system in the parameter space of uncorrelated Anderson disorder and Zeeman splitting energy. In the absence of disorder, the system undergoes the phases of higher-order topological insulators (HOTIs), Chern insulators (CIs) with Chern numbers C = 2 and C = 1, and band insulators successively with enhancing Zeeman energy. The phase boundary separating these phases is found to be strongly deformed by the disorder, which leads to several topological Anderson insulators. Specifically, there exist phase transitions between CI with C = 2 and HOTI, and between CIs with C = 1 and C = 2. For the former one, it is in fact a phase transition between first-order and second-order topological phases. Besides, these disorder induced phase transitions are well explained by self-consistent Born approximation.

引用

页数：9

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