Anisotropic Elliott–Yafet theory and application to KC8 potassium intercalated graphite

Bence G. Márkus, Lénárd Szolnoki, Dávid Iván, Balázs Dóra, Péter Szirmai, Bálint Náfrádi, László Forró, Ferenc Simon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report electron spin resonance (ESR) measurements on stage-I potassium intercalated graphite (KC 8). Angular dependent measurements show that the spin–lattice relaxation time is longer when the magnetic field is perpendicular to the graphene layer as compared to when the magnetic field is in the plane. This anisotropy is analyzed in the framework of the Elliott–Yafet theory of spin-relaxation in metals. The analysis considers an anisotropic spin–orbit Hamiltonian and the first order perturbative treatment of Elliott is reproduced for this model Hamiltonian. The result provides an experimental input for the first-principles theories of spin–orbit interaction in layered carbon and thus to a better understanding of spin-relaxation phenomena in graphene and in other layered materials as well.

Original languageEnglish
Pages (from-to)2505-2508
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume253
Issue number12
DOIs
Publication statusPublished - Dec 1 2016

Keywords

  • ESR
  • Elliott–Yafet theory
  • anisotropy
  • graphite
  • intercalation compound
  • spin relaxation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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