Hyperfine-mediated spin-flip transitions in GaAs quantum dots

被引：1
|
作者：
Erlingsson, SI
Nazarov, YV
Fal'ko, VI
机构：
[1] Delft Univ Technol, Dept Appl Phys, NL-2628 CJ Delft, Netherlands
[2] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 12卷 / 1-4期
关键词：
quantum dots; hyperfine interaction; spin-flip rates;
D O I：
10.1016/S1386-9477(01)00446-5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Spin-flip rates in GaAs quantum dots can be quite slow, thus opening up the possibilities to manipulate spin states in the dots. We present here estimations of inelastic spin-flip rates mediated by hyperfine interaction with nuclei, Under general assumptions. the nucleus mediated rate is proportional to the phonon relaxation rate for the corresponding non-spin-flip transitions. The rate can be accelerated in the vicinity of a singlet-triplet excited states crossing. We compare our results with known mechanisms of spin-flip in GaAs quantum dot. D 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：823 / 826
页数：4
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