title: Determination of the hyperfine coupling tensor in organic conductors κ-(BEDT-TTF)₂X (X=Cu[N(CN)₂]Br, Cu(NCS)₂) on central ¹³C sites.
abstract: Although the organic superconductors κ-(BEDT-TTF)2X (X=Cu[N(CN)2]Br and Cu(NCS)2) have been studied by NMR spectroscopy, hyperfine coupling tensors are required to quantify NMR spectra. Angle dependences of NMR spectra were measured to determine hyperfine coupling tensors applicable to further NMR assessments of attractive physical phenomena on κ-salts. The tensors of κ-(BEDT-TTF)2X and β(')-(BEDT-TTF)2ICl2 salts were compared to determine the hyperfine coupling mechanism in organic metals, with the results indicating that off-site dimer contribution should be considered. We also report the electron correlation of these salts and further application of the tensors.
authors.affiliation: Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Saito
authors.affiliation: Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kawamoto
keywords: (13)C NMR; Electron correlation; Hyperfine coupling tensor; Organic conductor