Regensburg 2004 – scientific programme
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HL: Halbleiterphysik
HL 29: Spinabh
ängiger Transport I
HL 29.12: Talk
Wednesday, March 10, 2004, 18:00–18:15, H13
Spin polarization due to Rashba spin-orbit and boundary scattering — •Kai Dittmer1, Jun-Ichiro Ohe1,2, and Bernhard Kramer1 — 11. Institut für Theoretische Physik, Universität Hamburg — 2Physics Department of Sophia University (Tokio)
We calculate spin resolved transport properties of a three terminal [1] fork-shaped structure with spin-orbit coupling of the Rashba type. For the calculation of the conductance we apply the transfer matrix method for the Ando model of the Rashba hamiltonian in the ballistic regime. The conductance is computed as a function of the Fermi energy for different values of the spin-orbit coupling constant and for different geometrical structures and sizes of the model. We observe high polarization and transmission in the conductance in certain regions of the Fermi energy that can be explained by spin-orbit and boundary scattering [2]. The dependence of the spin polarization of the current in different regions of the sample and the corresponding probability density of the scattering states is investigated. The possibility of observing the effects in experiment is discussed.
[1] Kiselev and Kim, Appl. Phys. Lett. 78, 775 (2001); J. Appl. Phys. 94, 4001 (2003).
[2] Chen et al., cond-mat/0308569