Impurity-induced stabilization of Luttinger liquid in quasi-one-dimensional conductors

Details Impurity-induced stabilization of Luttinger liquid in quasi-one-dimensional conductors Impurity-induced stabilization of Luttinger liquid in quasi-one-dimensional conductors

2003-10-21

arxiv.org/abs/cond-mat/0310489v2

JETP Letters, 79(6), 277-281 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, revtex, final version published in JETP Letts

Scientific paper

10.1134/1.1759409

It is shown theoretically that the Luttinger liquid phase in quasi-one-dimensional conductors can exist in the presence of impurities in a form of a collection of bounded Luttinger liquids. The conclusion is based upon the observation by Kane and Fisher that a local impurity potential in Luttinger liquid acts, at low energies, as an infinite barrier. This leads to a discrete spectrum of collective charge and spin density fluctuations, so that interchain hopping can be considered as a small parameter at temperatures below the minimum excitation energy of the collective modes. The results are compared with recent experimental observation of a Luttinger-liquid-like behavior in thin NbSe$_3$ and TaS$_3$ wires.

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