Share Email Print

Proceedings Paper

Dependence of quantum kinetic effects in the spin dynamics of diluted magnetic semiconductors on the excitation conditions
Author(s): M. Cygorek; F. Ungar; P. I. Tamborenea; V. M. Axt
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Non-Markovian quantum kinetic features, that cannot be captured by rate equations, have been predicted theoretically in the spin dynamics in diluted magnetic semiconductors excited with a circularly polarized laser. In order to identify situations which are most promising for detecting the genuine quantum kinetic effects in future experiments, we study numerically the strength of these effects for a number of different excitation conditions. In particular, we show that laser pulse durations of the order of the spin-transfer rate or longer are well suited for studying the non-Markovian effects. Furthermore, in the presence of an external magnetic field, the quantum kinetic theory predicts a significantly different stationary value for the carrier spin polarization than Markovian rate equations, which can be attributed to the build-up of strong carrier-impurity correlations.

Paper Details

Date Published: 26 September 2016
PDF: 13 pages
Proc. SPIE 9931, Spintronics IX, 993147 (26 September 2016); doi: 10.1117/12.2235914
Show Author Affiliations
M. Cygorek, Univ. Bayreuth (Germany)
F. Ungar, Univ. Bayreuth (Germany)
P. I. Tamborenea, Univ. de Buenos Aires (Argentina)
V. M. Axt, Univ. Bayreuth (Germany)

Published in SPIE Proceedings Vol. 9931:
Spintronics IX
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?