Spin polarization in a double bend quantum wire with Rashba spin-orbit coupling

Based on Green’s function method, we investigate spin-dependent transport properties of a double bend quantum wire. It is found that a notable spin polarization can be achieved in a broad energy range when magnetic field and Rashba spin-orbit coupling (RSOC) only exist in the intersection of two qua...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2010-09, Vol.405 (17), p.3581-3584
Main Authors: Li, Hang, Ping Chen, Yuan, Xie, Yue E, Xin Zhong, Jian
Format: Article
Language:English
Subjects:
Amplitudes
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Double bend quantum wire
Electronic transport in condensed matter
Exact sciences and technology
Joining
Magnetic fields
Physics
Polarization
Quantum wires
Spin polarization
Spin polarized transport
Spin-orbit coupling
Strength
Transport properties
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Summary:Based on Green’s function method, we investigate spin-dependent transport properties of a double bend quantum wire. It is found that a notable spin polarization can be achieved in a broad energy range when magnetic field and Rashba spin-orbit coupling (RSOC) only exist in the intersection of two quantum wires. The strength of RSOC and magnetic field has drastic influence on the spin polarization. The amplitude of spin polarization can be tuned from 0% to 100% by adjusting RSOC or magnetic field. In addition, the effect of geometric size on the spin polarization is discussed. The results show that the double bend quantum wire may be employed for spin filter.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2010.05.044