Electron transport for a laser-irradiated quantum channel with Rashba spin--orbit coupling |
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| Authors: | Zhao Hu Liao Wen-Hu and Zhou Guang-Hui |
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| Affiliation: | Department of Physics, Hunan Normal University, Changsha 410081, China; Department of Physics, Zunyi Normal College, Zunyi 563002, China |
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| Abstract: | We investigate theoretically the electron transport for a two-level
quantum channel (wire) with Rashba spin--orbit coupling under the
irradiation of a longitudinally-polarized external laser field at low
temperatures. Using the method of equation of motion for Keldysh
nonequilibrium Green function, we examine the time-averaged spin
polarized conductance for the system with photon polarization
parallel to the wire direction. By analytical analysis and a few
numerical examples, the interplay effects of the external laser field
and the Rashba spin--orbit coupling on the spin-polarized conductance
for the system are demonstrated and discussed. It is found that the
longitudinally-polarized laser field can adjust the spin polarization
rate and produce some photon sideband resonances of the conductance
for the system. |
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| Keywords: | Rashba quantum wire laser field spin-polarized transport nonequilibrium Green function |
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