• 文献标题:   Jahn-Teller coupling to moire phonons in the continuum model formalism for small-angle twisted bilayer graphene
  • 文献类型:   Article
  • 作  者:   ANGELI M, FABRIZIO M
  • 作者关键词:  
  • 出版物名称:   EUROPEAN PHYSICAL JOURNAL PLUS
  • ISSN:   2190-5444
  • 通讯作者地址:   Int Sch Adv Studies SISSA
  • 被引频次:   0
  • DOI:   10.1140/epjp/s13360-020-00647-7
  • 出版年:   2020

▎ 摘  要

We show how to include the Jahn-Teller coupling of moire phonons to the electrons in the continuum model formalism which describes small-angle twisted bilayer graphene. These phonons, which strongly couple to the valley degree of freedom, are able to open gaps at most integer fillings of the four flat bands around the charge neutrality point. Moreover, we derive the full quantum mechanical expression of the electron-phonon Hamiltonian, which may allow accessing phenomena such as the phonon-mediated superconductivity and the dynamical Jahn-Teller effect.