Spin splitting and precession in quantum dots with spin-orbit coupling:: The role of spatial deformation -: art. no. 085306

被引：38

作者：

Valín-Rodríguez, M ^{[1
]}

Puente, A

Serra, L

机构：

[1] Univ Illes Balears, Dept Fis, E-07122 Palma de Mallorca, Spain

[2] CSIC, UIB, Inst Mediterrani Estudis Avancats IMEDEA, E-07122 Palma de Mallorca, Spain

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.69.085306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Extending a previous work on spin precession in GaAs/AlGaAs quantum dots with spin-orbit coupling, we study the role of deformation in the external confinement. Small elliptical deformations are enough to alter the precessional characteristics at low magnetic fields. We obtain approximate expressions for the modified g factor including weak Rashba and Dresselhaus spin-orbit terms. For more intense couplings numerical calculations are performed. We also study the influence of the magnetic-field orientation on the spin splitting and the related anisotropy of the g factor. Spin-orbit coupling effects can reproduce the experimental spin splittings reported by Hanson [Phys. Rev. Lett. 91, 196802 (2003)] for a one-electron dot. For dots containing more electrons, Coulomb interaction effects are estimated within the local-spin-density approximation, showing that many features of the noninteracting system are qualitatively preserved.

引用

页数：7

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