Phonon modulation of the spin-orbit interaction as a spin relaxation mechanism in quantum dots

被引：17
|
作者：
Romano, C. L. [1 ]
Marques, G. E. [2 ]
Sanz, L. [3 ]
Alcalde, A. M. [3 ]
机构：
[1] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil
[3] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG, Brazil
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.77.033301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We calculate the spin relaxation rates in a parabolic InSb quantum dot due to the spin interaction with acoustical phonons. We considered the deformation potential mechanism as the dominant electron-phonon coupling in the Pavlov-Firsov spin-phonon Hamiltonian. By studying suitable choices of magnetic field and lateral dot size, we determine regions where the spin relaxation rates can be practically suppressed. We analyze the behavior of the spin relaxation rates as a function of an external magnetic field and mean quantum dot radius. Effects of the spin admixture due to Dresselhaus contribution to spin-orbit interaction are also discussed.
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页数：4
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