For GaSb/AlSb heterostructures with the absolute conduction minimum deriving from the L point of the bulk Brillouin zone, we predict zero-field spin splittings well exceeding 10 meV, about one order of magnitude larger than typical values resulting from the Dresselhaus and Rashba spin-orbit coupling terms near the zone center. Electronic structure calculations are performed within an improved tight-binding model and the main results can be reproduced in a 4x4 k.p Hamiltonian including band parameters and k-linear spin splittings derived from the GaSb bulk. Our results provide direct insight into L-valley heterostructures, indicating a promising direction for future research on spintronics.

Giant spin splittings in GaSb/AlSb L-valley quantum wells

LA ROCCA, Giuseppe Carlo;
2004

Abstract

For GaSb/AlSb heterostructures with the absolute conduction minimum deriving from the L point of the bulk Brillouin zone, we predict zero-field spin splittings well exceeding 10 meV, about one order of magnitude larger than typical values resulting from the Dresselhaus and Rashba spin-orbit coupling terms near the zone center. Electronic structure calculations are performed within an improved tight-binding model and the main results can be reproduced in a 4x4 k.p Hamiltonian including band parameters and k-linear spin splittings derived from the GaSb bulk. Our results provide direct insight into L-valley heterostructures, indicating a promising direction for future research on spintronics.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/3055
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