• 文献标题:   Giant Magnetodrag in Graphene at Charge Neutrality
  • 文献类型:   Article
  • 作  者:   TITOV M, GORBACHEV RV, NAROZHNY BN, TUDOROVSKIY T, SCHUTT M, OSTROVSKY PM, GORNYI IV, MIRLIN AD, KATSNELSON MI, NOVOSELOV KS, GEIM AK, PONOMARENKO LA
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:   Radboud Univ Nijmegen
  • 被引频次:   43
  • DOI:   10.1103/PhysRevLett.111.166601
  • 出版年:   2013

▎ 摘  要

We report experimental data and theoretical analysis of Coulomb drag between two closely positioned graphene monolayers in a weak magnetic field. Close enough to the neutrality point, the coexistence of electrons and holes in each layer leads to a dramatic increase of the drag resistivity. Away from charge neutrality, we observe nonzero Hall drag. The observed phenomena are explained by decoupling of electric and quasiparticle currents which are orthogonal at charge neutrality. The sign of magnetodrag depends on the energy relaxation rate and geometry of the sample.