2008/11/03 by Jens Mueller, Mueller, Jens, Jens Brandenburg +3
Chemistry · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Inorganic Chemistry and Materials #Magnetism in coordination complexes #Organic and Molecular Conductors Research #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0811.0361
5 pages, 4 figures
arxiv created 2008/11/03 · openalex publication_date 2008/11/03 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
Fluctuation spectroscopy is used to investigate the organic bandwidth-controlled Mott system κ-(BEDT-TTF)2Cu[N(CN)2]Cl. We find evidence for percolative-type superconductivity in the spatially inhomogeneous coexistence region of antiferromagnetic insulating and superconducting states which develops under pressure at low temperatures. When the superconducting transition is driven by a magnetic field, percolation seems to be dominated by unstable superconducting clusters upon approaching Tc (B) from above, before a "classical" type of percolation is resumed at low fields, dominated by the fractional change of superconducting clusters. The 1/f noise is resolved into Lorentzian spectra in the crossover region where the action of an individual mesoscopic fluctuator is enhanced.