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arXiv 1605.03399cond-mat.mes-hall
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任意磁场作用下高迁移率量子阱中自旋相干的各向异性

Anisotropy of spin coherence in high mobility quantum wells with arbitrary magnetic fields

M. Prada, D. Pfannkuche

摘要:

本文从理论上研究了在任意磁场作用下典型量子阱中自旋弛豫和退相干的各向异性。在这样的系统中,由于缺乏自旋-旋转对称性,磁场相对于主结晶方向的取向是至关重要的。对于典型的高迁移率样品,由于Rashba和Dresselhaus自旋轨道耦合的相互作用,在运动窄化极限的弛豫各向异性进行了计算。我们还考虑了动量项的影响。虽然在文献中通常被忽略,后者被实验证明了强各向异性的观察自旋退相干测量不同的实验组,长期以来一直无法解释。

英文摘要:

We present a theoretical study of the anisotropy of the spin relaxation and decoherence in typical quantum wells with an arbitrary magnetic field. In such systems, the orientation of the magnetic field relative to the main crystallographic directions is crucial, owing to the lack of spin-rotation symmetry. For typical high mobility samples, relaxation anisotropies in the motional narrowing limit owing to the interplay of Rashba and Dresselhaus spin orbit coupling are calculated. We also include the effect of the cubic-in-momentum terms. Although commonly ignored in literature, the latter were experimentally evidenced by the observation of strong anisotropy in spin decoherence measurements by different experimental groups and has long remained unexplained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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