Optical spin polarization and Hanle effect in GaAsSb: Temperature dependence

Journal Article · Mon Aug 25 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4893981· OSTI ID:22310949

Qiu, Weiyang; Wang, Xingjun; Chen, Pingping; Li, Ning; Lu, Wei ^[1]

---

1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083 (China)

Continuous-wave optical orientation spectroscopy and the Hanle effect are used to investigate the optical spin polarization and spin dephasing time (gT{sub s}) in GaAsSb with a Sb concentration of ∼6% as a function of temperature. Optical and spin polarizations up to ∼21% were achieved at ∼120 K, and the scaled spin lifetime gT{sub s} decreased monotonously from ∼1.5 ns at 5 K to ∼20 ps at 200 K. We demonstrate that the spin properties of GaAs could be modified by incorporating a small percentage of Sb into it, as a result of an increase in the spin–orbit interactions.

• OSTI ID: 22310949
• Journal Information: Applied Physics Letters, Vol. 105, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIMONY COMPOUNDS
ARSENIC COMPOUNDS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LIFETIME
L-S COUPLING
POLARIZATION
SPECTROSCOPY
SPIN
SPIN ORIENTATION
TEMPERATURE DEPENDENCE