| Autor: |
Mosoyan, K. S., Rozhkov, A. V., Sboychakov, A. O., Rakhmanov, A. L. |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 97, 075131 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.97.075131 |
| Popis: |
Simple hexagonal graphite, also known as AA graphite, is a metastable configuration of graphite. Using tight-binding approximation it is easy to demonstrate 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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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