Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 50: HL Poster IV
HL 50.13: Poster
Donnerstag, 15. März 2018, 19:00–21:00, Poster B
Spin Lifetime and Magnetoconductance in Wurtzite Semiconductor Nanowires — •Paul Wenk1, Michael Kammermeier1, John Schliemann1, Florian Dirnberger2, and Dominique Bougeard2 — 1Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Deutschland — 2Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Deutschland
This study is motivated by our experiments on catalytically grown wurtzite semiconductor nanowires, where spin densities are optically excited homogeneously along the nanowire axis [1]. Recently, we carried out these measurements by systematically changing the wire width. Here, a theoretical analysis of the width dependent D’yakonov-Perel’ spin relaxation in these wires is presented, which is due to spin-orbit coupling in the diffusive regime. It is shown that the motional narrowing differs significantly from the case in zincblende wires [2,3]. Moreover, by taking into account an external electric and magnetic field magnetoconductivity corrections (weak (anti-)localization) are calculated, going also beyond the diffusive regime by following Ref. [4].
[1] S. Furthmeier et al., Nat. Commun. 7, 12413 (2016)
S. Kettemann, PRL 98 176808 (2007)
M. Kammermeier et al., arXiv:1709.02621 (2017)
P. Wenk et al., PRB 83 115301 (2011)