High-resolution thermal-expansion measurements of tetrathiafulvalenetetracyanoquinodimethane (TTF-TCNQ)

D. E. Schafer, G. A. Thomas, F. Wudl

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


An analysis of our measurements of the b-axis expansivity b of tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) within the Debye approximation suggests an unexpectedly high effective Debye temperature (b=20030 K) and a large anharmonicity (=51.5) for the low-lying b-axis polarized acoustic phonons. These values for and b indicate substantial softening of the lattice above 100 K and also suggest an expansivity contribution from intramolecular vibrational modes. No anomalous length changes were observed in the region of the metal-semiconductor transition (45-65 K) to within LbLb 3×10-5.

Original languageEnglish (US)
Pages (from-to)5532-5535
Number of pages4
JournalPhysical Review B
Issue number12
StatePublished - 1975
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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