Local evolutions of nodal points in two-dimensional systems with chiral symmetry

doi:10.1088/1674-1056/28/7/077101

Abstract

Two-dimensional systems with chiral symmetry allow stable discrete band crossings (nodal points) in Brillouin zones. Here we study the local evolutions of these nodal points under chiral symmetry preserving perturbations. We find that these evolutions can be classified by different types of local k·p models around the nodal points. Several concrete examples are calculated to illustrate our results.

Keywords: nodal points chiral symmetry k·p model

Received: 09 April 2019
Accepted manuscript online:

PACS:	71.90.+q	(Other topics in electronic structure)
	03.65.Vf	(Phases: geometric; dynamic or topological)

Fund:

Project supported by the National Basic Research Program of China (Grant Nos. 2015CB921300 and 2017YFA0303100), the National Natural Science Foundation of China (Grant Nos. 1190020, 11534014, and 11334012), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDB07000000 and XDB28000000).

Corresponding Authors: Zhesen Yang
E-mail: yangzs@iphy.ac.cn

Cite this article:

Peiyuan Fu(符培源), Zhesen Yang(杨哲森), Jiangping Hu(胡江平) Local evolutions of nodal points in two-dimensional systems with chiral symmetry 2019 Chin. Phys. B 28 077101

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