• 文献标题:   Graphene electronic structure in charge density waves
  • 文献类型:   Article
  • 作  者:   VAIL JM, HERNANDEZ OJ, SI MS, WANG ZF
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS RESEARCH
  • ISSN:   0884-2914 EI 2044-5326
  • 通讯作者地址:   Univ Manitoba
  • 被引频次:   0
  • DOI:   10.1557/jmr.2017.265
  • 出版年:   2017

▎ 摘  要

We introduce the idea that the electronic band structure of a charge density wave system may mimic that of graphene. In that case, a class of materials quite different from graphene might be opened up to exploit graphene's remarkable properties. For such materials, their dynamical rather than static properties are crucial. The charge density wave system requires a wave geometry simply related to graphene and self-consistency among the electrons which requires the net Coulomb and phonon-mediated parts of the electron-electron interactions to be attractive. Our model leads to an analytical expression for the total energy in terms of the effective electron mass mu, the electron density rho(0), and the strength (v) over tilde (K) of the net electron-electron interaction. We examine the limitations set upon (v) over tilde (K) by self-consistency, stability, and the approximation in the electronic state calculation and find them to be mutually compatible.