Spin susceptibilities, spin densities and their connection to spin-currents

Details Spin susceptibilities, spin densities and their connection to spin-currents Spin susceptibilities, spin densities and their connection to spin-currents

2004-06-22

arxiv.org/abs/cond-mat/0406531v2

Phys. Rev. B 71, 035319 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, revtex4 style

Scientific paper

10.1103/PhysRevB.71.035319

We calculate the frequency dependent spin susceptibilities for a two-dimensional electron gas with both Rashba and Dresselhaus spin-orbit interaction. The resonances of the susceptibilities depends on the relative values of the Rashba and Dresselhaus spin-orbit constants, which could be manipulated by gate voltages. We derive exact continuity equations, with source terms, for the spin density and use those to connect the spin current to the spin density. In the free electron model the susceptibilities play a central role in the spin dynamics since both the spin density and the spin current are proportional to them.

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