Nuclear Spin-Lattice Relaxation and Local Susceptibilities in Tetrathiafulvalene Tetracyanoquinodimethane

Abstract
We present the temperature dependence of the proton spin-lattice relaxation rates (T11) for pure tetrathiafulvalene tetracyanoquinodimethane (TTF-TCNQ) and its deuterated analogs TTF(D4)-TCNQ and TTF-TCNQ(D4). In the metallic region, the relaxation is Korringa-like, characteristic of metals without strong electron-electron Coulomb correlations.