Invasive probe effects in four terminal resistance of a quantum wire with an impurity

H. AITA; L. ARRACHEA; C. NAÓN

San Carlos de Bariloche

Conferencia; Recent Progress in Many Body Theories; 2011

 We have nvestigated the behaviour of the four-terminal resistance R_{4pt} in an interacting quantum wire in the presence of a back-scattering impurity. In particular, we focused on the effects of the invasiveness of the probes, going further than the leading order in pertubation theory. Analysis of the results are discussed, concerning the possibility of observing a negative 4t-resistance, with emphasis on the role of the e-e interactions.