Scientific Calendar Event



Starts 3 Apr 2014 12:30
Ends 3 Apr 2014 18:00
Central European Time
ICTP
Strada Costiera, 11 I - 34151 Trieste (Italy)
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.
  • M. Poropat