Electron spin dynamics in cubic GaN

被引：8
作者：
Buss, J. H. [1 ]
Schupp, T. [2 ]
As, D. J. [2 ]
Brandt, O. [3 ]
Haegele, D. [1 ]
Rudolph, J. [1 ]
机构：
[1] Ruhr Univ Bochum, Arbeitsgrp Spektroskopie Kondensierten Mat, Univ Str 150, D-44780 Bochum, Germany
[2] Univ Paderborn, Dept Phys, Warburger Str 100, D-33095 Paderborn, Germany
[3] Paul Drude Inst Festkorperelekt, Hausvogteipl 5-7, D-10117 Berlin, Germany
来源：
PHYSICAL REVIEW B | 2016年 / 94卷 / 23期
关键词：
MOLECULAR-BEAM EPITAXY; ZINC BLENDE; SCATTERING; RELAXATION; GAAS; ALN; PHOTOLUMINESCENCE; POLARIZATION; IMPURITIES; ZINCBLENDE;
D O I：
10.1103/PhysRevB.94.235202
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electron spin dynamics in cubic GaN is comprehensively investigated by time-resolved magneto-optical Kerr-rotation spectroscopy over a wide range of temperatures, magnetic fields, and doping densities. The spin dynamics is found to be governed by the interplay of spin relaxation of localized electrons and Dyakonov-Perel relaxation of delocalized electrons. Localized electrons significantly contribute to spin relaxation up to room temperature at moderate doping levels, while Dyakonov-Perel relaxation dominates for high temperatures or degenerate doping levels. Quantitative agreement to Dyakonov-Perel theory requires a larger value of the spin-plitting constant than theoretically predicted. Possible reasons for this discrepancy are discussed, including the role of charged dislocations.
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页数：15
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