Spin-Galvanic Effect in Quantum Wells
S. D. Ganichev (1), E. L. Ivchenko (2), V. V. Bel'kov (2), S. A., Tarasenko (2), M. Sollinger (1), D. Schowalter (1), D. Weiss (1), W., Wegscheider (1), W. Prettl (1) ((1) Fakultaet fuer Physik, Universitaet, Regensburg, Regensburg, Germany
TL;DR
This paper demonstrates that non-equilibrium spin polarization in semiconductor quantum wells induces an electric current due to asymmetric spin-flip scattering caused by spin-orbit coupling.
Contribution
It reveals the microscopic mechanism linking spin polarization to electric current via spin-flip scattering asymmetry in quantum wells.
Findings
Spin polarization generates an electric current in quantum wells.
The effect arises from asymmetry in spin-flip scattering.
Spin-orbit coupling causes the asymmetry in the system.
Abstract
It is shown that a homogeneous non-equlibrium spin-polarization in semiconductor heterostructures results in an electric current. The microscopic origin of the effect is an inherent asymmetry of spin-flip scattering in systems with lifted spin degeneracy caused by k-linear terms in the Hamiltonian.
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Taxonomy
TopicsQuantum and electron transport phenomena · Advanced Physical and Chemical Molecular Interactions · Quantum optics and atomic interactions