INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Four-terminal resistance of an interacting quantum wire
LILIANA ARRACHEA; CARLOS NAÓN; MARIANO SALVAY
Workshop; Workshop on the physics of nanostructures and nanomaterials; 2007
Centro Atómico Bariloche
We investigate the behavior of the directed current in one-dimensional systems of Dirac fermions driven by local periodic potentials in the forward as well as in backscattering channels. We treat the problem with Keldysh nonequilibrium Greens function formalism. We present an exact solution for the case of an infinite wire and show that in this case the dc current vanishes identically. We also investigate a confined system consistent in an annular arrangement coupled to a particle reservoir. We present a perturbative treatment that allows for the analytical expressions of the dc current in the lowest order of the amplitudes of the potential. We also present results obtained from the numerical solution of the exact Dysons equations.