2011/05/31 by Pascale Auban-Senzier, Pascale Auban‐Senzier, D. Jérôme +16 · 14 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Anisotropy #Chemistry #Condensed matter physics #Electrical resistivity and conductivity #Hyperconjugation #Magnetism in coordination complexes #Molecular Junctions and Nanostructures #Molecule #Organic and Molecular Conductors Research #Organic superconductor #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Scattering #Scattering rate #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/23/34/345702
published in Journal of Physics Condensed Matter 23(34), 345702 (IOP Publishing)
openalex publication_date 2011/08/12 · arxiv created 2011/08/19 · arxiv updated 2012/01/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Comparing resistivity data of the quasi-one-dimensional superconductors (TMTSF)2PF6 and (TMTSF)2ClO4 along the least conducting c(⋆)-axis and along the high conductivity a-axis as a function of temperature and pressure, a low temperature regime is observed in which a unique scattering time governs the transport along both directions of these anisotropic conductors. However, the pressure dependence of the anisotropy implies a large pressure dependence of the interlayer coupling. This is in agreement with the results of first-principles density functional theory calculations implying methyl group hyperconjugation in the TMTSF molecule. In this low temperature regime, both materials exhibit for ρ(c) a temperature dependence aT + bT(2). Taking into account the strong pressure dependence of the anisotropy, the T-linear ρ(c) is found to correlate with the suppression of the superconducting Tc, in close analogy with ρ(a) data. This work reveals the domain of existence of the three-dimensional coherent regime in the generic (TMTSF)2X phase diagram and provides further support for the correlation between T-linear resistivity and superconductivity in non-conventional superconductors.