Specific heat anomalies in the quasi two-dimensional monophosphate tungsten bronzes KxP4W8O32

V. Bondarenko, J. W. Brill, J. Dumas, C. Schlenker

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The monophosphate tungsten bronzes KxP4W 8O32 (0.75 < x < 2) are quasi-two-dimensional conductors which show electronic transitions at a critical temperature T c depending on the concentration of the alkali metal. The phase diagram shows a maximum at Tc = 170 K for x = 1.30. We report specific heat measurements in the range 120-190 K. The thermal anomalies found at the transition temperature are larger than in conventional charge density wave materials. This corroborates that the transition is not a 'pure' charge density wave transition and that a structural transition dominates the instability.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalSolid State Communications
Volume129
Issue number4
DOIs
StatePublished - Jan 2004

Bibliographical note

Funding Information:
The authors wish to thank D. Groult for the crystal growth, S. Drouard for the characterization and transport studies of the crystals measured in this work, P. Foury and J.P. Pouget for helpful discussions. One of us (J.W.B.) acknowledges the support of the US National Science Foundation (Grant #DMR-0100572).

Keywords

  • A. Monophosphate tungsten bronzes
  • D. Charge density waves
  • D. Specific heat

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

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