Abstract
We calculate the transport relaxation time and spin transport relaxation time for a two-dimensional electron gas with spatially fluctuating Rashba spin-orbit interaction. These relaxation times determine the electrical and spin conductivity of the two-dimensional system, respectively. It is shown that the transport relaxation time is a nonmonotonic function of electron energy , whereas the spin transport relaxation time decreases with increasing , similarly to the conventional electron relaxation time that characterizes the decay of an electron state corresponding to certain values of the momentum and spin. Such a behavior of the relaxation times leads to unusual temperature dependence of the electrical and spin conductivity.
- Received 27 March 2018
- Revised 29 May 2018
DOI:https://doi.org/10.1103/PhysRevB.97.245307
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