2009/11/18 by N. Doiron-Leyraud, P. Auban-Senzier, Pascale Auban‐Senzier +7 · 5 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Density of states #Electrical resistivity and conductivity #Fermi level #Fermi liquid theory #Iron-based superconductors research #Materials science #Organic and Molecular Conductors Research #Pairing #Physics #Pnictogen #Quantum mechanics #Rare-earth and actinide compounds #Scattering #Scattering rate #Spin density wave #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physb.2009.11.021
published in Physica B Condensed Matter 405(11), S265-S268 (Elsevier BV) · ISCOM'09 proceedings to be published in Physica B
openalex publication_date 2009/11/18 · arxiv created 2009/12/10 · arxiv updated 2012/01/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The electrical resistivity of the quasi-1D organic superconductor (TMTSF)2PF6 was recently measured at low temperature from the critical pressure needed to suppress the spin-density-wave state up to a pressure where superconductivity has almost disappeared. This data revealed a direct correlation between the onset of superconductivity at Tc and the strength of a non-Fermi-liquid linear term in the normal-state resistivity, going as r(T) = r0 + AT + BT2 at low temperature, so that A goes to 0 as Tc goes to 0. Here we show that the contribution of low-frequency antiferromagnetic fluctuations to the spin-lattice relaxation rate is also correlated with this non-Fermi-liquid term AT in the resistivity. These correlations suggest that anomalous scattering and pairing have a common origin, both rooted in the low-frequency antiferromagnetic fluctuations measured by NMR. A similar situation may also prevail in the recently-discovered iron-pnictide superconductors.