Abstract
An all-electrical semiconductor device for generating and detecting spin-polarized currents with a two-stage cascade of three-terminal spin filters is discussed, where the first stage serves as the spin polarizer and the second stage serves as the detector. Transport simulations show imbalanced output conductance for higher-order subbands, independent of the spin-orbit coupling strength. However, when only the lowest subband is occupied the simulations show that the conductance asymmetry is spin-orbit dependent. Therefore, the conductance asymmetry of the lowest subband can be used to indicate spin polarization. Based on the simulations an experimental device to measure the spin-dependent conductance asymmetry is proposed.
Original language | English (US) |
---|---|
Article number | 066106 |
Journal | Journal of Applied Physics |
Volume | 104 |
Issue number | 6 |
DOIs | |
State | Published - 2008 |
ASJC Scopus subject areas
- General Physics and Astronomy