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Hexamethylene-tetrathiafulvalenium tetracyanoquinodimethanide as a prototype of a quasi-one-dimensional organic conductor

1977; American Physical Society; Volume: 16; Issue: 4 Linguagem: Inglês

10.1103/physrevb.16.1380

0556-2805

Y. Tomkiewicz, A. R. Taranko, Robert R. Schumaker,

Perovskite Materials and Applications

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 $50\ensuremath{\le}T\ensuremath{\le}300$ 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.