Electronic structure and transport for a laser-field-irradiated quantum wire with Rashba spin–orbit coupling

2006/06/14 by Guanghui Zhou, Wenhu Liao
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Conductance #Coupling (piping) #Electronic structure #Molecular Junctions and Nanostructures #Perpendicular #Polarization (electrochemistry) #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum wire #Spin polarization #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1088/0953-8984/18/40/003

published as Journal of Physics :Condensed Matter 18, 9161 (2006) · 7 pages, 6 figures

arxiv created 2006/06/14 · openalex publication_date 2006/09/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate theoretically the electronic structure and transport for a two-level quantum wire with Rashba spin–orbit coupling (SOC) under the irradiation of an external laser field at low temperatures. The photon-induced transitions between SOC-split subbands with the same lateral confinement quantum number and between subbands with different confinement quantum numbers are expected. Using the method of equation of motion (EOM) for Keldysh nonequilibrium Green's functions (NGF), we examine the time-averaged density of states (DOS) and the spin-polarized conductance for the system with photon polarization perpendicular to the wire direction. Through the analytical analysis and some numerical examples, the interplay effects of the external laser field and the Rashba SOC on both the DOS and the conductance of the system are demonstrated and discussed. It is found that the external laser field can adjust the spin polarization rate and the transport of the quantum wire system with some appropriate Rashba SOC strengths.

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