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The effect of spin-orbit interaction on optical conductivity in graphene

Journal Article


Abstract


  • We present a systematic investigation of the effect of spin-orbit interaction on optical conductivity in monolayer graphene. Our key findings are: (i) level splitting at various crystal symmetry points caused by true spin as well as pseudospin of the electrons gives rise to a resonant current response; (ii) under heavy doping, the spin-orbit interaction leads to a re-entrance of finite conductivity at very low frequency which was strictly forbidden in the absence of spin-orbit coupling; (iii) deformation of band structure and the topological properties of trigonal warping are analytically identified in a low-energy conical-like approximation.

Authors


  •   Wang, Wei (external author)
  •   Chao Zhang
  •   Ma, Zhongshui (external author)

Publication Date


  • 2012

Citation


  • Wang, W., Zhang, C. & Ma, Z. (2012). The effect of spin-orbit interaction on optical conductivity in graphene. Journal of Physics: Condensed Matter, 24 (3), 1-9.

Scopus Eid


  • 2-s2.0-84255171575

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5174

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 24

Issue


  • 3

Abstract


  • We present a systematic investigation of the effect of spin-orbit interaction on optical conductivity in monolayer graphene. Our key findings are: (i) level splitting at various crystal symmetry points caused by true spin as well as pseudospin of the electrons gives rise to a resonant current response; (ii) under heavy doping, the spin-orbit interaction leads to a re-entrance of finite conductivity at very low frequency which was strictly forbidden in the absence of spin-orbit coupling; (iii) deformation of band structure and the topological properties of trigonal warping are analytically identified in a low-energy conical-like approximation.

Authors


  •   Wang, Wei (external author)
  •   Chao Zhang
  •   Ma, Zhongshui (external author)

Publication Date


  • 2012

Citation


  • Wang, W., Zhang, C. & Ma, Z. (2012). The effect of spin-orbit interaction on optical conductivity in graphene. Journal of Physics: Condensed Matter, 24 (3), 1-9.

Scopus Eid


  • 2-s2.0-84255171575

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5174

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 24

Issue


  • 3