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

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Volume
405
Issue
17
Identifiers
DOI: 10.1016/j.physb.2010.05.044
Keywords
  • Spin Polarization
  • Spin-Orbit Coupling
  • Double Bend Quantum Wire
Disciplines
  • Mathematics
  • Physics

Abstract

Abstract 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.

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