The Non-Dissipative Spin-Hall Current

Details The Non-Dissipative Spin-Hall Current The Non-Dissipative Spin-Hall Current

2005-09-23

arxiv.org/abs/cond-mat/0509607v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

submitted to P.R.L

Scientific paper

A theory based on the Aharonov -Bohm effect in the momentum space for the Spin-Hall conductivity without a magnetic field is presented. The two dimensional Rashba Hamiltonian is diagonalized in the momentum spinor basis. This spinor is singular at K=0. The representation of the cartesian coordinates in the spinor momentum basis obey non-commutative rules. The non-commuting relations are a result of an effective Aharonov-Bohm vortex at K=0. We find the exact value of $\frac{e}{4\pi}$ for the Spin-Hall conductivity. The effect of a time reversal scattering potential on the Spin-Hall current causes the current to vanishes for an infinite system.

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