中国物理B ›› 2019, Vol. 28 ›› Issue (7): 77101-077101.doi: 10.1088/1674-1056/28/7/077101

所属专题: SPECIAL TOPIC — Topological semimetals

• SPECIAL TOPIC—Topological semimetals • 上一篇    下一篇

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

Peiyuan Fu(符培源), Zhesen Yang(杨哲森), Jiangping Hu(胡江平)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Kavli Institute of Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
    4 Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
  • 收稿日期:2019-04-09 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Zhesen Yang E-mail:yangzs@iphy.ac.cn
  • 基金资助:

    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).

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

Peiyuan Fu(符培源)1,2, Zhesen Yang(杨哲森)1,2, Jiangping Hu(胡江平)1,3,4   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Kavli Institute of Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
    4 Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
  • Received:2019-04-09 Online:2019-07-05 Published:2019-07-05
  • Contact: Zhesen Yang E-mail:yangzs@iphy.ac.cn
  • Supported by:

    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).

摘要:

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.

关键词: nodal points, chiral symmetry, k·p model

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.

Key words: nodal points, chiral symmetry, k·p model

中图分类号:  (Other topics in electronic structure)

  • 71.90.+q
03.65.Vf (Phases: geometric; dynamic or topological)