High temperature electron spin dynamics in bulk cubic GaN: Nanosecond spin lifetimes far above room-temperature

Journal Article · Mon Nov 03 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4901108· OSTI ID:22310707

Buß, J. H.; Schaefer, A.; Hägele, D.; Rudolph, J. ^[1]; Schupp, T.; As, D. J. ^[2]

---

1. Arbeitsgruppe Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, Universitätsstraße 150, D-44780 Bochum (Germany)
2. Department of Physics, University of Paderborn, Warburger Str. 100, D-33095 Paderborn (Germany)

The electron spin dynamics in n-doped bulk cubic GaN is investigated for very high temperatures from 293 K up to 500 K by time-resolved Kerr-rotation spectroscopy. We find extraordinarily long spin lifetimes exceeding 1 ns at 500 K. The temperature dependence of the spin relaxation time is in qualitative agreement with predictions of Dyakonov-Perel theory, while the absolute experimental times are an order of magnitude shorter than predicted. Possible reasons for this discrepancy are discussed, including the role of phase mixtures of hexagonal and cubic GaN as well as the impact of localized carriers.

• OSTI ID: 22310707
• Journal Information: Applied Physics Letters, Vol. 105, Issue 18; 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
CARRIERS
CUBIC LATTICES
DOPED MATERIALS
ELECTRONS
GALLIUM NITRIDES
HEXAGONAL LATTICES
KERR EFFECT
LIFETIME
RELAXATION TIME
ROTATION
SPECTROSCOPY
SPIN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TIME RESOLUTION