Spin-density wave state in simple hexagonal graphite

K. S. Mosoyan, A. V. Rozhkov, A. O. Sboychakov, A. L. Rakhmanov

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Simple hexagonal graphite, also known as AA graphite, is a metastable configuration of graphite. Using tight-binding approximation, it is easy to show that AA graphite is a metal with well-defined Fermi surface. The Fermi surface consists of two sheets, each shaped like a rugby ball. One sheet corresponds to electron states, another corresponds to hole states. The Fermi surface demonstrates good nesting: a suitable translation in the reciprocal space superposes one sheet onto another. In the presence of the electron-electron repulsion, a nested Fermi surface is unstable with respect to spin-density-wave ordering. This instability is studied using the mean-field theory at zero temperature, and the spin-density-wave order parameter is evaluated.

Original languageEnglish
Article number075131
JournalPhysical Review B
Volume97
Issue number7
DOIs
Publication statusPublished - 14 Feb 2018
Externally publishedYes

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