Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 70: Spintronics: Mobile electrons and holes (with MA/TT)
HL 70.1: Vortrag
Donnerstag, 19. März 2015, 10:00–10:15, ER 164
Conserved Spin Quantity in Strained Hole Systems with Rashba and Dresselhaus Spin-Orbit Coupling — •Michael Kammermeier1, Paul Wenk1, John Schliemann1, Klaus Richter1, and Roland Winkler2 — 1Universität Regensburg, D-93040 Regensburg, Germany — 2Northern Illinois University, IL 60115 DeKalb, US
We investigate conditions for the existence of a conserved spin quantity in two-dimensional hole gases in zincblende type semiconductor heterostructures. It is shown that in the presence of shear stress, a symmetric in-plane strain, and both Rashba and Dresselhaus spin-orbit coupling one can find such a conserved quantity. The found optimal parameter-space, for strain and spin-orbit coupling strength, gives the possibility to an experimental access. This is in contrast to previous works which require restrictions on the band model parameters (here the Luttinger parameters) which are either difficult to realize in real materials or even singular (γ3=0).
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