Duc Huynh Thanh, Meier T, Koch S W
Department of Physics and Material Sciences Center, Philipps University, Renthof 5, D-35032 Marburg, Germany.
Phys Rev Lett. 2005 Aug 19;95(8):086606. doi: 10.1103/PhysRevLett.95.086606. Epub 2005 Aug 17.
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.
从微观角度描述了半导体异质结构中自旋和电荷电流的相干光注入及时间衰减，包括激子效应、多体库仑关联以及二阶玻恩 - 马尔可夫能级上的载流子与纵光学声子耦合，还有非微扰光场诱导的带内和带间激发。预测了电流对激光束强度的非单调依赖性。由于库仑散射，自旋电流相对于电荷电流的阻尼增强。
