Hexamethylene-tetrathiafulvalenium tetracyanoquinodimethanide as a prototype of a quasi-one-dimensional organic conductor
Phys. Rev. B 16, 1380 – Published 15 August, 1977
DOI: https://doi.org/10.1103/PhysRevB.16.1380
Abstract
Decomposition of the magnetic susceptibility of hexamethylene-tetrathiafulvalenium tetracyanoquinodimethanide (HMTTF-TCNQ) to donor and acceptor contributions yields the following results: (i) The spin susceptibility of the donor stack is temperature independent in the temperature range of the metallic conductivity K. (ii) The acceptor stack susceptibility exhibits in the same temperature range a pronounced temperature dependence. (iii) The magnitude of the acceptor stack susceptibility is vanishingly small at the metal-insulator transition temperature. These findings are interpreted in terms of a broad temperature range of Peierls fluctuations on the acceptor stacks.