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

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

2001-05-15

arxiv.org/abs/cond-mat/0105298v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Text 4 pages in Latex/Revtex format, 4 Postscript figures. Phys. Rev. Lett.,in press

Scientific paper

The Coulomb drag between two spatially separated, 2 \mu m 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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