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.
Received: 27 September 2006
Revised: 21 November 2006
Accepted manuscript online:
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
Fund: Project supported by the
National Natural Science Foundation of China (Grant No
10574042), and the Hunan Provincial Natural Science Foundation
of China (Grant No 06JJ2097).
Cite this article:
Zhao Hua(赵华), Liao Wen-Hu(廖文虎), and Zhou Guang-Hui(周光辉) Electron transport for a laser-irradiated quantum channel with Rashba spin--orbit coupling 2007 Chinese Physics 16 1748
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