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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 1 (1998) pp 39-46
Transverse transport in $\mathsf{ (TM)_{2}X}$ organic conductors: possible evidence for a Luttinger liquid
J. Moser (1) (a), M. Gabay (1), P. Auban-Senzier (1), D. Jérome (1), K. Bechgaard (2), J.M. Fabre (3)
(1) Laboratoire de Physique des Solides (URA 02 CNRS), Université Paris-Sud, 91405 Orsay Cedex, France
(2) Department of Solid State Physics, Risø National Laboratory, 4000 Roskilde, Denmark
(3) Laboratoire de Chimie Structurale Organique, Université des Sciences et Techniques du Languedoc, place E. Bataillon, 34060 Montpellier, France
Received: 28 June 1997 / Received in final form: 4 September 1997 / Accepted: 30 September 1997
Abstract: We present c-axis resistivity measurements performed on the organic conductors ${\rm (TMTSF)_{2}PF_{6}}$ and ${\rm (TMTTF)_{2}PF_{6}}$ under pressure. The aim is to probe the density of states of quasi-one dimensional compounds the high temperature properties of which are those of a Luttinger liquid. It is found that the 1-D Luttinger description breaks down below a specific pressure-dependent temperature, giving rise to a transient regime. The Fermi liquid behaviour is however restored at low temperature i.e. around 10 K, as evidenced by NMR measurements. Accordingly, two different energy scales 100 K and 10 K are required to get a fair understanding of all observed physical phenomena. Our interpretation supports the picture of a power law exponent $K_{\rho} $ for the correlation functions of the order of 0.25-0.30.
PACS. 67.55.Hc Transport properties - 71.10.Pm Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) - 74.20.Mn Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, luttinger liquid, etc.)
(a) e-mail: moser@lps.u-psud.fr
Online publication: February 4, 1998
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