Density of states of graphene in the presence of strong point defects

Bor Luen Huang, Ming Che Chang, Chung Yu Mou

研究成果: 雜誌貢獻期刊論文同行評審

17 引文 斯高帕斯(Scopus)

摘要

The density of states near zero energy in a graphene due to strong point defects with random positions are computed. Instead of focusing on density of states directly, we analyze eigenfunctions of inverse T matrix in the unitary limit. Based on numerical simulations, we find that the squared magnitudes of eigenfunctions for the inverse T matrix show random-walk behavior on defect positions. As a result, squared magnitudes of eigenfunctions have equal a priori probabilities, which further implies that the density of states is characterized by the well-known Thomas-Porter-type distribution. The numerical findings of Thomas-Porter-type distribution are further derived in the saddle-point limit of the corresponding replica field theory of inverse T matrix. Furthermore, the influences of the Thomas-Porter distribution on magnetic and transport properties of a graphene, due to its divergence near zero energy, are also examined.

原文英語
文章編號155462
期刊Physical Review B - Condensed Matter and Materials Physics
82
發行號15
DOIs
出版狀態已發佈 - 2010 十月 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

指紋 深入研究「Density of states of graphene in the presence of strong point defects」主題。共同形成了獨特的指紋。

引用此