• 文献标题:   Critical wavefunctions in disordered graphene
  • 文献类型:   Article
  • 作  者:   BARRIOSVARGAS JE, NAUMIS GG
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF PHYSICSCONDENSED MATTER
  • ISSN:   0953-8984
  • 通讯作者地址:   Univ Nacl Autonoma Mexico
  • 被引频次:   6
  • DOI:   10.1088/0953-8984/24/25/255305
  • 出版年:   2012

▎ 摘  要

In order to elucidate the presence of non-localized states in doped graphene, a scaling analysis of the wavefunction moments, known as inverse participation ratios, is performed. The model used is a tight-binding Hamiltonian considering nearest and next-nearest neighbors with random substitutional impurities. Our findings indicate the presence of non-normalizable wavefunctions that follow a critical (power-law) decay, which show a behavior intermediate between those of metals and insulators. The power-law exponent distribution is robust against the inclusion of next-nearest neighbors and growing the system size.