Sliding Luttinger liquid phases

Details Sliding Luttinger liquid phases Sliding Luttinger liquid phases

2001-02-09

arxiv.org/abs/cond-mat/0102163v2

Physical Review B 64, 045120 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

Revtex, 18 pages, 8 figures

Scientific paper

10.1103/PhysRevB.64.045120

We study systems of coupled spin-gapped and gapless Luttinger liquids. First, we establish the existence of a sliding Luttinger liquid phase for a system of weakly coupled parallel quantum wires, with and without disorder. It is shown that the coupling can {\it stabilize} a Luttinger liquid phase in the presence of disorder. We then extend our analysis to a system of crossed Luttinger liquids and establish the stability of a non-Fermi liquid state: the crossed sliding Luttinger liquid phase (CSLL). In this phase the system exhibits a finite-temperature, long-wavelength, isotropic electric conductivity that diverges as a power law in temperature $T$ as $T \to 0$. This two-dimensional system has many properties of a true isotropic Luttinger liquid, though at zero temperature it becomes anisotropic. An extension of this model to a three-dimensional stack exhibits a much higher in-plane conductivity than the conductivity in a perpendicular direction.

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