CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Topological properties in ABA trilayer graphene underthe irradiation of light |
Liang Chen(陈亮) |
School of Physics and Electronic Engineering, Taishan University, Taian 271000, China |
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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.
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Received: 17 June 2019
Revised: 06 September 2019
Accepted manuscript online:
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PACS:
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73.43.-f
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(Quantum Hall effects)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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85.60.-q
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(Optoelectronic devices)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61604106) and Shandong Provincial Natural Science Foundation, China (Grant No. ZR2014FL025). |
Corresponding Authors:
Liang Chen
E-mail: 30750574@163.com
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Cite this article:
Liang Chen(陈亮) Topological properties in ABA trilayer graphene underthe irradiation of light 2019 Chin. Phys. B 28 117304
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