Enhanced Nuclear Relaxation in a One-Dimensional Metal near the Mott Transition

Abstract

We present an experimental study of the nuclear spin-lattice relaxation in a one-dimensional metal near the metal-insulator transition. The data obtained from the charge transfer salt $N$-methyl-phenazinium-tetracyanoquinodimethan directly confirm the enhanced susceptibility predicted for a one-dimensional metal at $q\ensuremath{\simeq}2{k}_{\mathrm{F}}$ and provide insight into the nature of the metal-insulator transition.