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VOLUME 79 (2004) | ISSUE 6 | PAGE 335
Impurity-induced stabilization of Luttinger liquid in quasi-one-dimensional conductors
PACS: 71.10.-w, 71.27.+a, 71.45.Lr
Abstract
It is shown theoretically that the Luttinger liquid can exist in quasi-one-dimensional conductors 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 NbSe3 and TaS3 wires.