Delocalization in Coupled Luttinger Liquids with Impurities

Details Delocalization in Coupled Luttinger Liquids with Impurities Delocalization in Coupled Luttinger Liquids with Impurities

2001-10-12

arxiv.org/abs/cond-mat/0110265v2

Phys. Rev. B 65, 224507 (2002).

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 5 figures, substantially extended and revised version

Scientific paper

10.1103/PhysRevB.65.224507

We study effects of quenched disorder on coupled two-dimensional arrays of Luttinger liquids (LL) as a model for stripes in high-T_c compounds. In the framework of a renormalization-group analysis, we find that weak inter-LL charge-density-wave couplings are always irrelevant as opposed to the pure system. By varying either disorder strength, intra- or inter-LL interactions, the system can undergo a delocalization transition between an insulator and a novel strongly anisotropic metallic state with LL-like transport. This state is characterized by short-ranged charge-density-wave order, the superconducting order is quasi long-ranged along the stripes and short-ranged in the transversal direction.

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