Microscopic analysis of the coherent optical generation and the decay of charge and spin currents in semiconductor heterostructures

Details Microscopic analysis of the coherent optical generation and the decay of charge and spin currents in semiconductor heterostructures Microscopic analysis of the coherent optical generation and the decay of charge and spin currents in semiconductor heterostructures

2005-02-23

arxiv.org/abs/cond-mat/0502557v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

The coherent optical injection and temporal decay of spin and charge currents in semiconductor heterostructures is described microscopically, including excitonic effects, carrier LO-phonon and carrier-carrier scattering, as well as nonperturbative light-field-induced intraband and interband excitations. A nonmonotonous dependence of the currents on the intensities of the laser beams is predicted. Enhanced damping of the spin current relative to the charge current is obtained as a consequence of spin-dependent Coulomb scattering.

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