Spin-dependent transmission in waveguides with periodically modulated strength of the spin-orbit interaction

Abstract

The electron transmission $T$ is evaluated through waveguides, in which the strength of the spin-orbit interaction(SOI) $\alpha$ is varied periodically, using the transfer-matrix technique. It is shown that $T$ exhibits a {\it spin-transistor} action, as a function of $\alpha$ or of the length of one of the two subunits of the unit cell, provided only one mode is allowed to propagate in the waveguide. A similar but not periodic behavior occurs as a function of the incident electron energy. A transparent formula for $T$ through one unit is obtained and helps explain its periodic behavior. The structure considered is a good candidate for the establishment of a realistic spin transistor.

References in corpus (4)

• The Rashba Hamiltonian and electron transport
• Spin-current modulation and square-wave transmission through periodically stubbed electron waveguides
• Ballistic spin transport through electronic stub tuners: spin precession, selection, and square-wave transmission
• Spin-depedent transmission of holes through periodically modulated diluted magnetic semiconductor waveguides

Cited by in corpus (4)

• Quantum transport theory for nanostructures with Rashba spin-orbital interaction
• Spin-dependent electron transport in waveguide with continuous shape
• Designer spin-orbit superlattices: symmetry-protected Dirac cones and spin Berry curvature in two-dimensional van der Waals metamaterials
• Electron transport in waveguides with spatially modulated strengths of the Rashba and Dresselhaus terms of the spin-orbit interaction