Existence and topological stability of Fermi points in multilayered graphene

被引：195

作者：

Manes, J. L.

Guinea, F.

Vozmediano, Maria A. H.

机构：

[1] Univ Basque Country, Dept Fis Mat Condensada, E-48080 Bilbao, Spain

[2] CSIC, Inst Ciencia Mat, Unidad Asociada CSIC UC3M, E-28049 Madrid, Spain

[3] Univ Carlos III Madrid, Unidad Asociada CSIC UC3M, E-28911 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.75.155424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the existence and topological stability of Fermi points in a graphene layer and stacks with many layers. We show that the discrete symmetries (space-time inversion) stabilize the Fermi points in monolayer, bilayer, and multilayer graphenes with orthorhombic stacking. The bands near k=0 and epsilon=0 in multilayers with the Bernal stacking depend on the parity of the number of layers, and Fermi points are unstable when the number of layers is odd. The low-energy changes in the electronic structure induced by commensurate perturbations which mix the two Dirac points are also investigated.

引用

页数：6