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
收藏
页数：9
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