title: Microscopic analysis of the coherent optical generation and the decay of charge and spin currents in semiconductor heterostructures.
abstract: The coherent optical injection and temporal decay of spin and charge currents in semiconductor heterostructures is described microscopically, including excitonic effects, many-body Coulomb correlations, and the carrier LO-phonon coupling on the second-order Born-Markov level, as well as nonperturbative light-field-induced intraband and interband excitations. A nonmonotonic 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 Coulomb scattering.
authors.affiliation: Department of Physics and Material Sciences Center, Philipps University, Renthof 5, D-35032 Marburg, Germany.
authors.forename: Huynh Thanh
authors.initials: HT
authors.lastname: Duc
authors.forename: T
authors.initials: T
authors.lastname: Meier
authors.forename: S W
authors.initials: SW
authors.lastname: Koch