• 文献标题:   AA-stacked bilayer graphene in an applied electric field: Tunable antiferromagnetism and coexisting exciton order parameter
  • 文献类型:   Article
  • 作  者:   AKZYANOV RS, SBOYCHAKOV AO, ROZHKOV AV, RAKHMANOV AL, NORI F
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Moscow Phys Tech Inst
  • 被引频次:   13
  • DOI:   10.1103/PhysRevB.90.155415
  • 出版年:   2014

▎ 摘  要

We study the electronic properties of AA-stacked bilayer graphene in a transverse electric field. The strong on-site Coulomb repulsion stabilizes the antiferromagnetic order in such a system. The antiferromagnetic order is suppressed by the transverse bias voltage, at least partially. The interplane Coulomb repulsion and nonzero voltage stabilize an exciton order parameter. The exciton order parameter coexists with the antiferromagnetism and can be as large as several tens of meV for realistic values of the bias voltage and interaction constants. The application of a transverse bias voltage can be used to control the transport properties of the bilayer.