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Title: Tuning the spin Hall effect in a two-dimensional electron gas
Authors: Raimondi, Roberto
Schwab, Peter
Keywords: spin Hall effect
spin orbit
spin transport
electron transport
Issue Date: Aug-2009
Publisher: IOP Publishing
Abstract: We provide a theoretical framework for the electric field control of the electron spin in systems with diffusive electron motion. The approach is valid in the experimentally important case where both intrinsic and extrinsic spin-orbit interaction in a two-dimensional electron gas are present simultaneously. Surprisingly, even when the extrinsic mechanism is the dominant driving force for spin Hall currents, the amplitude of the spin Hall conductivity may be considerably tuned by varying the intrinsic spin-orbit coupling via a gate voltage. Furthermore we provide an explanation for the mechanism giving rise to the experimentally observed out-of-plane spin polarization in a (110) GaAs quantum well.
DOI: 10.1209/0295-5075/87/37008
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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