J. Phys. IV France 114 (2004) 539
DOI: 10.1051/jp4:2004114127

The low and high temperature phase transitions in the family of compounds (DT-TTF) ₄[ M(L) ₂]₃ , M = Au, Cu and L = pds, pdt

E.B. Lopes^{1, 1}, J.C. Dias¹, J.P. Seiça¹, I.C. Santos¹, J. Morgado², J. Morgado², R.T. Henriques^{1, 1, 2}, M. Almeida¹, X. Ribas³, K. Wurst⁴, J. Veciana³, J. Veciana³, C. Rovira³ and P. Foury-Leylekian<sup>5

1</sup>  Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal
    e-mail: eblopes@itn.pt
²  Instituto Superior Técnico, 1049-001 Lisboa, Portugal
    e-mail: rth@ist.utl.pt
³  Institut de Ciència de Materials de Barcelona, CSIC, 08193 Bellaterra, Spain
    e-mail: cun@icmab.es
⁴  Innsbruck University, Innrarain 52a, Innsbruck, Austria
    e-mail: Klaus.Wurst@uibk.ac.at
⁵  Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
    e-mail: foury@lps.u-psud.fr

Abstract
The compounds of the family (DT-TTF) ₄[ M(L) ₂] ₃ where M=Au, Cu and for L=pds, pdt have related structures and present a series of 1 ^st and 2 ^nd order phase transitions within a semiconducting regime which were studied by electrical transport and X-ray diffraction experiments. Key words. Charge transfer salts - Phase transitions - Transport properties - X-ray scattering.

© EDP Sciences 2004