Abstract
We propose an electronic spin-filter device that uses a nonmagnetic triple barrier resonant tunneling diode (TB-RTD). This device combines the spin-split resonant tunneling levels induced by the Rashba spin-orbit interaction and the spin blockade phenomena between two regions separated by the middle barrier in the TB-RTD. Detailed calculations using the InAlAs/InGaAs material system reveal that a splitting of a peak should be observed in the curve of this device as a result of the spin-filtering effect. The filtering efficiency exceeds at the peak positions in the curve.
- Received 1 October 2001
DOI:https://doi.org/10.1103/PhysRevLett.88.126601
©2002 American Physical Society