Spin-Hall Effect in A Symmetric Quantum Wells by A Random Rashba Field

Details Spin-Hall Effect in A Symmetric Quantum Wells by A Random Rashba Field Spin-Hall Effect in A Symmetric Quantum Wells by A Random Rashba Field

2008-05-06

arxiv.org/abs/0805.0678v1

Phys. Rev. B 77, 193302 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures in eps format

Scientific paper

10.1103/PhysRevB.77.193302

Changes dopant ion concentrations in the sides of a symmetric quantum well are known to create a random Rashba-type spin-orbit coupling. Here we demonstrate that, as a consequence, a finite size spin-Hall effect is also present. Our numerical algorithm estimates the result of the Kubo formula for the spin-Hall conductivity, by using a tight-binding approximation of the Hamiltonian in the framework of a time-dependent Green's function formalism, well suited for very large systems.

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