Spin-orbit coupling and intrinsic spin mixing in quantum dots

被引：74

作者：

Destefani, CF ^{[1
]}

Ulloa, SE

Marques, GE

机构：

[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[2] Ohio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701 USA

[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.69.125302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-orbit coupling effects are studied in narrow-gap InSb quantum dots. Competition between different Rashba and Dresselhaus terms is shown to produce wholesale changes in the spectrum. The large (and negative) g factor and the Rashba field produce states where spin is no longer a good quantum number and intrinsic flips occur at moderate magnetic fields. For dots with two electrons, singlet-triplet mixing occurs in the ground state, with observable signatures in intraband far-infrared absorption, and possible importance in quantum computation.

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页数：6

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