Testing the Elliott-Yafet spin-relaxation mechanism in KC 8: A model system of biased graphene

G. Fábián, B. Dóra, A. Antal, L. Szolnoki, L. Korecz, A. Rockenbauer, N. M. Nemes, L. Forró, F. 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 sizable anisotropy, its majority is shown to arise due to macroscopic magnetization. Even though the homogeneous ESR linewidth shows an unusual, nonlinear 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 KC 8 and allows us to place KC 8 on the empirical Beuneu-Monod plot among ordinary elemental metals.

Original languageEnglish
Article number235405
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number23
DOIs
Publication statusPublished - Jun 4 2012

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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