Intuitive approach to the unified theory of spin relaxation

Article

关键词: CONDUCTION ELECTRONS;    QUANTUM-WELLS;    SPINTRONICS;    PRECESSION;    RESONANCE;    ALUMINUM;   

DOI  :  10.1103/PhysRevB.96.245123

来源: SCIE

【 摘 要 】

Spin relaxation is conventionally discussed using two different approaches for materials with and without inversion symmetry. The former is known as the Elliott-Yafet (EY) theory and for the latter the D'yakonov-Perel' (DP) theory applies. We discuss herein a simple and intuitive approach to demonstrate that the two seemingly disparate mechanisms are closely related. A compelling analogy between the respective Hamiltonians is presented, and that the usual derivation of spin-relaxation times, in the respective frameworks of the two theories, can be performed. The result also allows us to obtain less canonical spin-relaxation regimes, i.e. the generalization of the EY when the material has a large quasiparticle broadening, and the DP mechanism in ultrapure semiconductors. The method also allows a practical and intuitive numerical implementation of the spin-relaxation calculation, which is demonstrated for MgB2, which has anomalous spin-relaxation properties.

【 授权许可】

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