Temperature dependence of Coulomb drag between finite-length quantum wires

Details Temperature dependence of Coulomb drag between finite-length quantum wires Temperature dependence of Coulomb drag between finite-length quantum wires

2007-04-04

arxiv.org/abs/0704.0515v2

Phys. Rev. Lett. 99, 086404 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures; v2: accepted version at PRL

Scientific paper

10.1103/PhysRevLett.99.086404

We evaluate the Coulomb drag current in two finite-length Tomonaga-Luttinger-liquid wires coupled by an electrostatic backscattering interaction. The drag current in one wire shows oscillations as a function of the bias 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.

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