Non-Markovian spin transfer dynamics in magnetic semiconductors despite short memory times
arXiv:1303.4322 · doi:10.1103/PhysRevB.87.205301
Abstract
A quantum kinetic theory of the spin transfer between carriers and Mn atoms in a Mn doped diluted magnetic semiconductor is presented. It turns out that the typical memory time associated with these processes is orders of magnitude shorter than the time scale of the spin transfer. Nevertheless, Markovian rate equations, which are obtained by neglecting the memory, work well only for bulk systems. For quantum wells and wires the quantum kinetic results qualitatively deviate from the Markovian limit under certain conditions. Instead of a monotonic decay of an initially prepared excess electron spin, an overshoot or even coherent oscillations are found. It is demonstrated that these features are caused by energetic redistributions of the carriers due to the energy-time uncertainty.
References in corpus (6)
- Spin dynamics in semiconductors
- Ultrafast demagnetization in the sp-d model: a theoretical study
- Femtosecond Demagnetization and Hot Hole Relaxation in Ferromagnetic GaMnAs
- Femtosecond Coherent Control of Spin with Light in (Ga,Mn)As ferromagnets
- Electron spin relaxation in paramagnetic Ga(Mn)As quantum wells
- Spin dynamics in (III,Mn)V ferromagnetic semiconductors: the role of correlations
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