Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-01-28
Phys. Rev. Lett. 102, 137001 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.102.137001
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.
Dóra Balázs
Simon Ferenc
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