中国物理B ›› 2019, Vol. 28 ›› Issue (11): 117304-117304.doi: 10.1088/1674-1056/ab478e

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Topological properties in ABA trilayer graphene underthe irradiation of light

Liang Chen(陈亮)   

  1. School of Physics and Electronic Engineering, Taishan University, Taian 271000, China
  • 收稿日期:2019-06-17 修回日期:2019-09-06 出版日期:2019-11-05 发布日期:2019-11-05
  • 通讯作者: Liang Chen E-mail:30750574@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61604106) and Shandong Provincial Natural Science Foundation, China (Grant No. ZR2014FL025).

Topological properties in ABA trilayer graphene underthe irradiation of light

Liang Chen(陈亮)   

  1. School of Physics and Electronic Engineering, Taishan University, Taian 271000, China
  • Received:2019-06-17 Revised:2019-09-06 Online:2019-11-05 Published:2019-11-05
  • Contact: Liang Chen E-mail:30750574@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61604106) and Shandong Provincial Natural Science Foundation, China (Grant No. ZR2014FL025).

摘要: We study ABA trilayer graphene under irradiation of a circularly polarized light. In high-frequency regime, the effective low-energy Hamiltonian is obtained based on the Floquet theory. With increasing circularly polarized light intensity, the band structure shows a band gap closing and reopening, which happen twice. The process of the band gap closing and reopening is accompanied with a topological phase transition. We investigate the Chern numbers and the anomalous Hall conductivities to confirm the topological phase transition. The interplay between light-induced circularity-dependent effective potential and effective sublattice potential is discussed.

关键词: graphene, light, Flouqet theory, Hall

Abstract: We study ABA trilayer graphene under irradiation of a circularly polarized light. In high-frequency regime, the effective low-energy Hamiltonian is obtained based on the Floquet theory. With increasing circularly polarized light intensity, the band structure shows a band gap closing and reopening, which happen twice. The process of the band gap closing and reopening is accompanied with a topological phase transition. We investigate the Chern numbers and the anomalous Hall conductivities to confirm the topological phase transition. The interplay between light-induced circularity-dependent effective potential and effective sublattice potential is discussed.

Key words: graphene, light, Flouqet theory, Hall

中图分类号:  (Quantum Hall effects)

  • 73.43.-f
78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 85.60.-q (Optoelectronic devices)