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1D-1D Coulomb Drag Signature of a Luttinger Liquid

Science  23 Jan 2014:

DOI: 10.1126/science.1244152

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Abstract

One-dimensional (1D) interacting electronic systems exhibit distinct properties when compared to their couterparts in higher dimensions. We report Coulomb drag measurements between vertically-integrated quantum wires separated by a barrier only 15 nm wide. The temperature dependence of the drag resistance is measured in the true 1D regime where both wires have less than one 1D subband occupied. As a function of temperature, an upturn in the drag resistance is observed below a temperature Embedded Image K. This crossover in Coulomb drag behavior is consistent with Tomonaga-Luttinger liquid models for the 1D-1D drag between quantum wires.

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