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Spin Hall Conductivity of a Two-Dimensional Electron Gas with Random Rashba Field

100%
Dyrdał A., Rataj M.
Acta Physica Polonica A
|
2015
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vol. 127
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issue 2
499-501
EN
Spin Hall effect in a two-dimensional electron gas with uniform and random components of the Rashba spin-orbit interaction is considered theoretically. Relaxation time due to scattering on Rashba fluctuations is also calculated. It is shown that the presence of a uniform component of Rashba coupling not only modifies relaxation time, but also suppresses the contribution to the spin Hall conductivity due to random Rashba field.
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Transmission Through Graphene Junctions with Rashba Spin-Orbit Coupling

100%
Rataj M., Barnaś J.
Acta Physica Polonica A
|
2015
|
vol. 127
|
issue 2
481-483
EN
Electronic transport in a graphene junction is considered theoretically. Graphene is assumed to be deposited on a substrate which generates Rashba spin-orbit coupling. However, the Rashba parameters in the two parts of the junction are assumed to be generally different. Additionally, different gate voltages are applied to the two parts, which allow tuning the Fermi level and potential step. We analyze the probabilities of electron transmission through the junction and electrical conductance in the linear response regime.
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