• 文献标题:   Coulomb impurity effect on Dirac electron in graphene magnetic dot
  • 文献类型:   Article
  • 作  者:   LEE CM, CHAN KS
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-8979 EI 1089-7550
  • 通讯作者地址:   City Univ Hong Kong
  • 被引频次:   4
  • DOI:   10.1063/1.4824808
  • 出版年:   2013

▎ 摘  要

Using the Dirac-Weyl model, we study the low-lying spectra of a massless Dirac electron bound to a positively charged Coulomb impurity in a graphene magnetic dot, for which the inhomogeneous magnetic field is created by different magnetic fields inside and outside the dot with a field ratio a. Numerical results show that the zero energy states, in the presence of the impurity, are converted into hole-like states. Additionally, for positive and negative a values, the states are, in general, located inside and outside the dot, respectively, causing the spectra to exhibit different features. (C) 2013 AIP Publishing LLC.