Magneto electronic properties of a graphite sheet

被引：43

作者：

Chang, CP

Lu, CL

Shyu, FL

Chen, RB

Fang, YK

Lin, MF

机构：

[1] Tainan Womans Coll Arts & Technol, Ctr Gen Educ, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[3] Chinese Mil Acad Kaohsiung, Dept Phys, Kaohsiung 830, Taiwan

[4] Natl Kaohsiung Marine Univ, Ctr Gen Educ, Kaohsiung 830, Taiwan

来源：

CARBON | 2004年 / 42卷 / 14期

关键词：

graphite; modeling; electronic properties; absorption;

D O I：

10.1016/j.carbon.2004.07.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetoelectronic structures of a two-dimensional (2D) graphite sheet are calculated by the tight-binding model. They are very sensitive to the magnitude of perpendicular magnetic field (B). B imposes the periodical boundary condition on the Bloch functions in the real and momentum spaces. Thus, B changes energy dispersions, energy spacing, bandwidth, and oscillation period of Landau levels. B could reduce the dimensionality of a graphite sheet. Energy dispersions mainly exhibit zero-dimensional (or 1 D) characteristics. A lot of delta-function-like peaks (or square-root peaks) in the density of states can be clearly found. The magnetic field dramatically changes the joint density of states and the magnetoabsorption spectra. So, many peaks with different structures are produced. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2975 / 2980

页数：6

共 35 条

[1] Butterfly-like spectra and collective modes of antidot superlattices in magnetic fields [J].