• 文献标题:   On the electron-polaron-electron-polaron scattering and Landau levels in pristine graphene-like quantum electrodynamics
  • 文献类型:   Article
  • 作  者:   DE LIMA WB, DEL CIMA OM, MIRANDA ED
  • 作者关键词:   solid state material
  • 出版物名称:   EUROPEAN PHYSICAL JOURNAL B
  • ISSN:   1434-6028 EI 1434-6036
  • 通讯作者地址:   Univ Fed Vicosa UFV
  • 被引频次:   0
  • DOI:   10.1140/epjb/e2020-100594-7
  • 出版年:   2020

▎ 摘  要

The parity-preserving U(1) x U(1) massless QED(3) is proposed as a pristine graphene-like planar quantum electrodynamics model. The spectrum content, the degrees of freedom, spin, masses, and charges of the quasiparticles (electron-polaron, hole-polaron, photon, and Neel quasiparticles), which emerge from the model are discussed. The four-fold broken degeneracy of the Landau levels, similar as the one experimentally observed in pristine graphene submitted to high applied external magnetic fields, is obtained. Furthermore, the model exhibits zero-energy Landau level indicating a kind of anomalous quantum Hall effect. The electron-polaron-electron-polaron scattering potentials in s- and p-wave states mediated by photon and Neel quasiparticles are computed and analyzed. Finally, the model foresees that two electron-polarons (s-wave state) belonging to inequivalent K and K points in the Brillouin zone might exhibit attractive interaction, while two electron-polarons (p-wave state) lying both either in K or in K points experience repulsive interaction.