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arXiv · 1203.5911

Testing the Elliott-Yafet spin-relaxation mechanism in KC8; a model system of biased graphene

Gábor Fábián·Balázs Dóra·Ágnes Antal·Lénárd Szolnoki·László Korecz·Antal Rockenbauer·Norbert M. Nemes·László Forró·Ferenc Simon
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Abstract

Temperature dependent electron spin resonance (ESR) measurements are reported on stage 1 potassium doped graphite, a model system of biased graphene. The ESR linewidth is nearly isotropic and although the g-factor has a sizeable anisotropy, its majority is shown to arise due to macroscopic magnetization. Albeit the homogeneous ESR linewidth shows an unusual, non-linear temperature dependence, it appears to be proportional to the resistivity which is a quadratic function of the temperature. These observations suggests the validity of the Elliott-Yafet relaxation mechanism in KC8 and allows to place KC8 on the empirical Beuneu-Monod plot among ordinary elemental metals.

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Gábor Fábián, Balázs Dóra, Ágnes Antal, Lénárd Szolnoki, László Korecz, Antal Rockenbauer, Norbert M. Nemes, László Forró, Ferenc Simon. 2012-03-27. Testing the Elliott-Yafet spin-relaxation mechanism in KC8; a model system of biased graphene. https://doi.org/10.1103/physrevb.85.235405

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