2013/12/31 by D. Laroche, G. Gervais, M. P. Lilly +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1126/science.1244152
published as Science 343, 631 (2014) · 16 pages, 3 figures
arxiv created 2014/02/12 · arxiv updated 2014/02/13
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 one-dimensional (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 in three distinct devices at a temperature T^* ∼ 1.6 K. This crossover in Coulomb drag behaviour is consistent with Tomonaga-Luttinger liquid models for the 1D-1D drag between quantum wires.