Spin transistor action from hidden Onsager reciprocity

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Adagideli, İnanç and Lutsker, V. and Scheid, M. and Jacquod, Ph. and Richter, K. (2012) Spin transistor action from hidden Onsager reciprocity. Physical Review Letters, 108 (23). ISSN 0031-9007

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Abstract

We investigate generic Hamiltonians for confined electrons with weak inhomogeneous spin-orbit coupling. Using a local gauge transformation we show how the SU(2) Hamiltonian structure reduces to a U(1)×U(1) structure for spinless fermions in a fictitious orbital magnetic field, to leading order in the spin-orbit strength. Using an Onsager relation, we further show how the resulting spin conductance vanishes in a two-terminal setup, and how it is turned on by either weakly breaking time-reversal symmetry or opening additional transport terminals, thus allowing one to switch the generated spin current on or off. We numerically check our theory for mesoscopic cavities as well as Aharonov-Bohm rings.
Item Type: Article
Additional Information: Article number: 236601
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: İnanç Adagideli
Date Deposited: 12 Jun 2012 11:14
Last Modified: 26 Apr 2022 08:56
URI: https://research.sabanciuniv.edu/id/eprint/19098

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