Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Long room-temperature electron spin lifetimes in bulk cubic J. H. Bu,a J. Rudolph,a T. Schupp,b D. J. As,b K. Lischka,b and D. Hagelea
 

Summary: Long room-temperature electron spin lifetimes in bulk cubic
GaN
J. H. Buß,a J. Rudolph,a T. Schupp,b D. J. As,b K. Lischka,b and D. H¨agelea
aArbeitsgruppe Spektroskopie der kondensierten Materie, Ruhr-Universit¨at Bochum, 44801
Bochum, Germany;
bDepartment of Physics, University of Paderborn, Warburger Str. 100, 33098 Paderborn,
Germany
ABSTRACT
We report on very long electron spin lifetimes in cubic GaN measured by time-resolved Kerr-rotation-spectroscopy.
The spin coherence times with and without external magnetic field exceed 500 ps at room temperature, despite
a high n-type doping level of more than 1019
cm-3
in the bulk sample under investigation. Our findings are
therefore highly relevant for spin optoelectronics in the blue wavelength regime. The spin lifetimes are found to
be almost temperature independent in accord with a prediction for degenerate electron gases of Dyakonov and
Perel from 1972. These results are discussed also in comparison to wurtzite GaN, which shows much shorter spin
lifetimes and a dependence of spin lifetimes on the spin orientation.
Keywords: spin relaxation, zincblende and wurtzite bulk GaN
1. INTRODUCTION
The idea to incorporate the electron's spin degree of freedom into semiconductor-based electronics has stim-

  

Source: As, Donat Josef - Department Physik, Universität Paderborn

 

Collections: Materials Science; Physics