Quantum antidot as a controllable spin injector and spin filter

Zozoulenko, I. V.; Evaldsson, M.
October 2004
Applied Physics Letters;10/11/2004, Vol. 85 Issue 15, p3136
Academic Journal
We propose a device based on an antidot embedded in a narrow quantum wire in the edge-state regime, that can be used to inject and/or control spin-polarized current. The operational principle of the device is based on the effect of resonant backscattering from one edge state into another through localized quasibound states, combined with the effect of Zeeman splitting of the quasibound states in sufficiently high magnetic field. We outline the device geometry, present detailed quantum-mechanical transport calculations, and suggest a possible scheme to test the device performance and functionality.


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