Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session Y21: Spin Transport and Magnetism in 1D and 2D Materials
11:15 AM–2:03 PM,
Friday, March 9, 2018
LACC
Room: 309
Sponsoring
Units:
GMAG DMP FIAP DCOMP
Chair: Igor Zutic, State Univ of NY - Buffalo
Abstract ID: BAPS.2018.MAR.Y21.4
Abstract: Y21.00004 : Semiconductor nanowires: Tracing spin relaxation into the one-dimensional quantum regime
11:51 AM–12:03 PM
Presenter:
Florian Dirnberger
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Authors:
Florian Dirnberger
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Jan König
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Moritz Forsch
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Christian Schüller
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Tobias Korn
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
Dominique Bougeard
(Institut für Experimentelle und Angewandte Physik, Universität Regensburg)
In this contribution, we systematically explore the fundamental characteristics of carriers in semiconductor nanowires all the way from a bulk-like environment down to clear 1D quantum confinement. In particular, we experimentally demonstrate that the relaxation time of an optically injected spin polarization increases by more than two orders of magnitude as we enhance the spatial confinement of the carriers. This increasing confinement is realized in catalytically grown wurtzite GaAs nanowires by epitaxially controlling the nanowire diameter down to ultrathin wires. We find the spin relaxation times in GaAs to exceed 200 ns when spatially squeezing the carriers into 1D quantum structures, demonstrating a clear transition in the spin relaxation physics.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.Y21.4
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