Topological kink states in graphene

Zibo Wang; Shuguang Cheng; Xiao Liu; Hua Jiang

doi:10.1088/1361-6528/ac0dd8

Topological kink states in graphene

Nanotechnology. 2021 Jul 12;32(40). doi: 10.1088/1361-6528/ac0dd8.

Authors

Zibo Wang^{1

2}, Shuguang Cheng³, Xiao Liu⁴, Hua Jiang^{4

5}

Affiliations

¹ College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, People's Republic of China.
² Center for Computational Sciences, Sichuan Normal University, Chengdu 610068, People's Republic of China.
³ Department of Physics, Northwest University, Xi'an 710069, People's Republic of China.
⁴ School of Physical Science and Technology, Soochow University, Suzhou 215006, People's Republic of China.
⁵ Institute for Advanced Study of Soochow University, Suzhou 215006, People's Republic of China.

PMID: 34161935
DOI: 10.1088/1361-6528/ac0dd8

Abstract

Due to the unique band structure, graphene exhibits a number of exotic electronic properties that have not been observed in other materials. Among them, it has been demonstrated that there exist the one-dimensional valley-polarized topological kink states localized in the vicinity of the domain wall of graphene systems, where a bulk energy gap opens due to the inversion symmetry breaking. Notably, the valley-momentum locking nature makes the topological kink states attractive to the property manipulation in valleytronics. This paper systematically reviews both the theoretical research and experimental progress on topological kink states in monolayer graphene, bilayer graphene and graphene-like classical wave systems. Besides, various applications of topological kink states, including the valley filter, current partition, current manipulation, Majorana zero modes and etc, are also introduced.

Keywords: Majorana zero modes; graphene; topological kink states; transport properties; valley-momentum locking; valleytronics.

Publication types

Review