Generalized Elliott-Yafet theory of electron spin relaxation in metals: the origin of the anomalous electron spin life-time in MgB2

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dc.creatorSimon, F.
dc.creatorDora, B.
dc.creatorMuranyi, F.
dc.creatorJanossy, A.
dc.creatorGaraj, S.
dc.creatorForro, L.
dc.creatorBud'ko, S.
dc.creatorPetrovic, C.
dc.creatorCanfield, P. C.
dc.date2008-08-06
dc.date2008-08-26
dc.date.accessioned2026-07-07T10:12:49Z
dc.date.available2026-07-07T10:12:49Z
dc.descriptionThe temperature dependence of the electron spin relaxation time in MgB2 is anomalous as it does not follow the temperature dependence of the resistivity above 150 K, it has a maximum around 400 K, and it decreases for higher temperatures. This violates the well established Elliot-Yafet theory of electron spin relaxation in metals. We show that the anomaly occurs when the quasi-particle scattering rate (in energy units) becomes comparable to the energy difference between the conduction- and a neighboring band. We find that the anomalous behavior is related to the unique band structure of MgB$_2$ and the large electron-phonon coupling. The saturating spin-lattice relaxation can be regarded as the spin transport analogue of the Ioffe-Regel criterion of electron transport.
dc.identifierhttps://arxiv.org/abs/0808.0818
dc.identifierhttp://arxiv.org/abs/0808.0818
dc.identifierPhys. Rev. Lett. 101, 177003 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.177003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172312
dc.subjectStrongly Correlated Electrons
dc.titleGeneralized Elliott-Yafet theory of electron spin relaxation in metals: the origin of the anomalous electron spin life-time in MgB2
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