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Coulomb Drag Between Quasiballistic Quantum Wires: an Indication of Non-Fermi-Liquid Behavior

P. Debray·V. Zverev·R. Klesse·E. Raichev·P. Vasilopoulos·M. Rahman
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Abstract

The Coulomb drag between two spatially separated, 2 μm long lithographically defined quantum wires has been studied experimentally in the absence of interwire tunneling. The drag resistance R_D shows peaks when the 1D subband bottoms of the wires are aligned and the Fermi wave vector k_F is small. R_D decreases exponentially with the interwire separation d. In the temperature range 0.2K to 1K the drag signal shows the {\it power-law dependence} R_D ~ T**x with x ranging from -0.61 to -0.77 depending on the magnitude of k_F. We interpret our experimental results in the framework of the Tomonaga-Luttinger liquid theory.

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P. Debray, V. Zverev, R. Klesse, E. Raichev, P. Vasilopoulos, M. Rahman. 2001-05-15. Coulomb Drag Between Quasiballistic Quantum Wires: an Indication of Non-Fermi-Liquid Behavior. https://arxiv.org/abs/cond-mat/0105298

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