Specific heat of TSeF-TCNQ

D. K. Powell, T. Miebach, S. L. Cheng, L. K. Montgomery, J. W. Brill

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We have measured the specific heat of single crystals of TSeF-TCNQ. Anomalies are observed at Ta = 28 K and Tb = 33 K, indicating that there are two phase transitions, presumably reflecting the separate condensation of the charge-density-wave on the TSeF and TCNQ conducting chains. The total increase of the specific heat on cooling through both transitions is larger than the value estimated from mean-field theory, as expected for transitions in a quasi-one dimensional material, but, because of the proximity of the two transitions, it is not possible to unambiguously determine the specific heat baseline and hence the magnitude of the specific heat step. A sharp peak in specific heat is also observed at Ta; if the entropy contained in this peak is to be associated with locking of the charge-density-wave phases on the two conducting chains, its large size implies a surprisingly small phase coherent volume.

Original languageEnglish
Pages (from-to)95-99
Number of pages5
JournalSolid State Communications
Issue number2
StatePublished - Oct 1997


  • A. organic crystals
  • D. heat capacity
  • Phase transitions

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Materials Chemistry


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