期刊
JOURNAL OF APPLIED PHYSICS
卷 104, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.2980328
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资金
- DOE Computational Science Graduate Fellowship [DE-FG02-97ER25308]
- Deutsche Forschungsgemeinschaft
- Sonderforschungsbereich 508 Quantenmaterialen
- Functional Metal-Semiconductor Hybrid Systems
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. (C) 2008 American Institute of Physics.
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