Generalized elliott-yafet theory of electron spin relaxation in metals

Origin of the anomalous electron spin lifetime in MgB2

F. Simon, B. Dóra, F. Murányi, A. Jánossy, S. Garaj, L. Forró, S. Bud'Ko, C. Petrovic, P. C. Canfield

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The temperature dependence of the electron-spin relaxation time in MgB2 is anomalous as it does not follow the resistivity above 150 K; it has a maximum around 400 K and decreases for higher temperatures. This violates the well established Elliot-Yafet theory of spin relaxation in metals. The anomaly occurs when the quasiparticle scattering rate (in energy units) is comparable to the energy difference between the conduction and a neighboring bands. The anomalous behavior is related to the unique band structure of MgB2 and the large electron-phonon coupling. The saturating spin relaxation is the spin transport analogue of the Ioffe-Regel criterion of electron transport.

Original languageEnglish
Article number177003
JournalPhysical Review Letters
Volume101
Issue number17
DOIs
Publication statusPublished - Oct 23 2008

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electron spin
life (durability)
metals
electrons
relaxation time
analogs
anomalies
conduction
temperature dependence
electrical resistivity
energy
scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Generalized elliott-yafet theory of electron spin relaxation in metals : Origin of the anomalous electron spin lifetime in MgB2. / Simon, F.; Dóra, B.; Murányi, F.; Jánossy, A.; Garaj, S.; Forró, L.; Bud'Ko, S.; Petrovic, C.; Canfield, P. C.

In: Physical Review Letters, Vol. 101, No. 17, 177003, 23.10.2008.

Research output: Contribution to journalArticle

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