Spin-density wave state in simple hexagonal graphite

被引：4

作者：

Mosoyan, K. S. ^{[1
]}

Rozhkov, A. V. ^{[1
,2
]}

Sboychakov, A. O. ^{[2
]}

Rakhmanov, A. L. ^{[1
,2
,3
]}

机构：

[1] Moscow Inst Phys & Technol, Moscow 141700, Russia

[2] Russian Acad Sci, Inst Theoret & Appl Electrodynam, Moscow 125412, Russia

[3] Dukhov Res Inst Automat, Moscow 127055, Russia

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

ELECTRONIC-PROPERTIES; ANTIFERROMAGNETISM; 1ST-PRINCIPLES; TRANSITION; FIELD; MODEL;

D O I：

10.1103/PhysRevB.97.075131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：9

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