Multifloquet to single channel transition in the transport properties of a Resistive 1d driven di

F. FOIERI, L. ARRACHEA AND M. J. SÁNCHEZ

PHYSICAL REVIEW LETTERS

Año: 2007 vol. 99 p. 266601 - 266604

0031-9007

We investigate the dc response of a 1D disordered ring coupled to a reservoir and driven by a magnetic flux with a linear dependence on time. We identify two regimes: (i) A localized  or large length $L$ regime, characterized by a dc conductance, $g_{dc}$, whose probability distribution $P(g_{dc})$ is identical to the one exhibited by a 1D  wire of the same length $L$ and disorder strength placed in a two terminal Landauer  setup.  (ii) A ``multifloquet'' regime for small $L$ and weak  coupling to the reservoir,which exhibits large currents and conductances that can be $g_{dc}> 1$, in spite of the fact that the ring  contains spinless electrons and a single electronic transmissionchannel. The crossover length  between the multifloquet to the single channel transport regime, $L_{c}$, is  controlled  by  the coupling to the reservoir.