Published September 21, 2015
| Version v1
Journal article
Exciton spin dynamics in GaSe
- 1. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
- 2. Department of Electrical Engineering, University of South Carolina, Columbia, South Carolina 29208 (United States)
Description
We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-dependent photoluminescence measurements in which the initial circular polarization approaches unity even when pumping with 0.15 eV excess energy. At T = 10 K, the exciton spin relaxation exhibits a biexponential decay with sub-20 ps and >500 ps time constants, which are also reproduced by the rate-equation model assuming distinct spin-relaxation rates for hot (nonequilibrium) and cold band-edge excitons
Additional details
Identifiers
- DOI
- 10.1063/1.4930809;
- arXiv
- arXiv:1504.07147v2;
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 118
- Journal Issue
- 11
- Journal Page Range
- p. 113103-113103.8
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 47059553
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- EXCITONS; GALLIUM SELENIDES; OPTICAL PUMPING; PHOTOLUMINESCENCE; POLARIZATION; RELAXATION; SPIN; SPIN FLIP; TIME DEPENDENCE
- Descriptors DEC
- ANGULAR MOMENTUM; CHALCOGENIDES; EMISSION; GALLIUM COMPOUNDS; LUMINESCENCE; PARTICLE PROPERTIES; PHOTON EMISSION; PUMPING; QUASI PARTICLES; SELENIDES; SELENIUM COMPOUNDS
Optional Information
- Notes
- (c) 2015 AIP Publishing LLC