Details

Autor(en) / Beteiligte

• Szolnoki, Lénárd
• Dóra, Balázs
• Kiss, Annamária
• Fabian, Jaroslav
• Simon, Ferenc

Titel

Intuitive approach to the unified theory of spin relaxation

Ist Teil von

• Physical review. B, 2017-12, Vol.96 (24), Article 245123

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

APS: American Physical Society E-Journals (Physics)

Beschreibungen/Notizen

• 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.