Regensburg 2007 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 31: Low-dimensional Systems - Models I

TT 31.3: Talk

Thursday, March 29, 2007, 18:15–18:30, H19

Temperature dependence of Coulomb drag between finite-length quantum wires — •Joël Peguiron, Björn Trauzettel, and Christoph Bruder — Department of Physics and Astronomy, University of Basel,Klingelbergstrasse 82, 4056 Basel, Switzerland

We evaluate the Coulomb drag current in two finite-length Tomonaga-Luttinger wires coupled by an electrostatic backscattering interaction. The drag current in one wire shows oscillations as a function of the drive voltage applied to the other wire, reflecting interferences of the plasmon standing waves in the interacting wires. In agreement with this picture, the amplitude of the current oscillations is reduced with increasing temperature. This is a clear signature of non-Fermi liquid physics because for coupled Fermi liquids the drag resistance is always expected to increase as the temperature is raised.