19F nuclear magnetic resonance study of the anisotropic anionic motions in the (TMTSF)2PF6 organic superconductor

Abstract

Molecular motions in an organic superconductor, (TMTSF)2 PF6, were investigated by means of 19F NMR. The temperature dependence of the spin-lattice relaxation rate was fitted with two distinct molecular motions, indicating two different modes ascribed to the distorted octahedral anion sublattice. As a result, anisotropic anionic motions, which may trigger the subtle mesoscopic electronic instability in this quasi-1D conductor, were revealed. © 2004 Elsevier B.V. All rights reserved.