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Bandar Astinchap

Bandar Astinchap

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 24342779500
Faculty: Faculty of Science
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Research

Title
The effects of spin-orbit coupling on optical properties of monolayer MoS2 due to mechanical strains
Type
JournalPaper
Keywords
MoS2, spin-orbit coupling, optical conductivity, Green’s function, external magnetic field
Year
2023
Journal Scientific Reports
DOI
Researchers Hamed Rezania ، Mona Abdi ، Bandar Astinchap ، Erfan Norian

Abstract

We have studied the optical conductivity of a quasi two-dimensional MoS2 in the presence of external magnetic field and spin-orbit coupling. Specially, we address the frequency dependence of optical conductivity due to spin-orbit interaction. Using linear response theory the behavior of optical conductivity has been obtained within Green’s function method. We have also considered the effects of uniaxial and biaxial in-plane strain on the optical absorption of MoS2 layer. In the absence of external magnetic field with negative uniaxial strain parameter, optical conductivity includes Drude weight at zero frequency limit while Drude weight vanishes for MoS2 layer under positive uniaxial strain. Our results show that the increase of uniaxial positive strain parameter causes to move the position peak to the higher frequencies. In contrast to uniaxial strain case, the Drude weight in optical conductivity appears at positive biaxial strain value 0.15. Also we have studied the effects of magnetic field, electron doping, hole doping in the presence of spin-orbit coupling on frequency dependence of optical conductivity of MoS2 in details. The magnetic field dependence of optical absorption shows a monotonic decreasing behavior for each value of temperature in the absence of strain parameter.