Next Nearest Neighbors Effects on Berry Curvature of Graphene

被引：2

作者：

Farajollahpour, T. ^{[1
]}

Rezvani, A. H. ^{[1
]}

Khodarahmi, M. R. ^{[1
]}

Arasteh, M. ^{[1
]}

机构：

[1] Fac Sci, Dept Phys, Ihu Tehran, Iran

来源：

ACTA PHYSICA POLONICA A | 2012年 / 122卷 / 01期

关键词：

ELECTRONIC-PROPERTIES; PHASE;

D O I：

10.12693/APhysPolA.122.180

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper energy bands and Berry curvature of graphene was studied. Desired Hamiltonian regarding the next-nearest neighbors was obtained by tight-binding model. By using the second quantization approach, the transformation matrix is calculated and the Hamiltonian of system is diagonalized. With this Hamiltonian, the band structure and wave function can be calculated. By using calculated wave function the Berry connection and Berry curvature of our system are calculated. Our results are exactly consistent with previous methods and also the Berry curvature throughout the Brillouin zone get zero.

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页码：180 / 183

页数：4

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