Electron spin dynamics in strongly correlated metals

Abstract

The temperature dependence of the electron spin life-time, T_1 and the g-factor are anomalous in alkali fullerides (K,Rb)_3C_60, which cannot be explained by the canonical Elliott-Yafet theory. These materials are archetypes of strongly correlated and narrow band metals. We introduce the concept of "complex electron spin resonance frequency shift" to treat these measurables in a unified manner within the Kubo formalism. The theory is applicable for metals with nearly degenerate conduction bands and large momentum scattering even with an anomalous temperature dependence and sizeable residual value.

5 pages, 2 figures

References in corpus (6)

• Spintronics: Fundamentals and applications
• Superconductivity in Fullerides
• Electron Spin Resonance in S=1/2 antiferromagnetic chains
• Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data
• The mean free path for electron conduction in metallic fullerenes
• 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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• An intuitive approach to the unified theory of spin-relaxation
• Testing the Elliott-Yafet spin-relaxation mechanism in KC8; a model system of biased graphene
• Doped carbon nanotubes as a model system of biased graphene
• Electron Spin Resonance of the itinerant ferromagnets LaCrGe3, CeCrGe3 and PrCrGe3