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Optical conductance of a two-dimensional semiconductor in the presence of Rashba spin-orbit coupling and a periodic potential

Journal Article


Abstract


  • We investigate the optical conductivity of a two-dimensional semiconductor with Rashba spin-orbit coupling subject to an external sinusoidal potential. Using Fourier series, we obtain quantitative results on the band structure of this system. The periodic potential can be treated as a perturbation of the Rashba Hamiltonian, with the induced band gap at degeneracy point being linear with the potential strength. The optical conductance displays a number of interesting features, namely the presence of multiple tunable resonances that originate from a k-shift of band extrema.

Authors


  •   O'Brien, T E. (external author)
  •   Chao Zhang

Publication Date


  • 2012

Citation


  • O'Brien, T. E. & Zhang, C. (2012). Optical conductance of a two-dimensional semiconductor in the presence of Rashba spin-orbit coupling and a periodic potential. Modern Physics Letters B, 26 (26), 1-7.

Scopus Eid


  • 2-s2.0-84866293403

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/26

Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 26

Issue


  • 26

Abstract


  • We investigate the optical conductivity of a two-dimensional semiconductor with Rashba spin-orbit coupling subject to an external sinusoidal potential. Using Fourier series, we obtain quantitative results on the band structure of this system. The periodic potential can be treated as a perturbation of the Rashba Hamiltonian, with the induced band gap at degeneracy point being linear with the potential strength. The optical conductance displays a number of interesting features, namely the presence of multiple tunable resonances that originate from a k-shift of band extrema.

Authors


  •   O'Brien, T E. (external author)
  •   Chao Zhang

Publication Date


  • 2012

Citation


  • O'Brien, T. E. & Zhang, C. (2012). Optical conductance of a two-dimensional semiconductor in the presence of Rashba spin-orbit coupling and a periodic potential. Modern Physics Letters B, 26 (26), 1-7.

Scopus Eid


  • 2-s2.0-84866293403

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/26

Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 26

Issue


  • 26