Specific heat measurement of the spinel compound CuV2S 4

Hironari Okada, Keiichi Koyama, Kazuo Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We have performed specific heat measurements of a high-quality polycrystalline sample of CuV2S4. Two anomalies associated with charge density wave (CDW) transitions are clearly observed at T t1 = 92 K and Tt2h = 58 K. The anomalies at Tt1 and Tt2h show λ-type and spike-shaped behavior, indicating second and first order phase transitions, respectively. The electronic specific heat coefficient γ and the Debye temperature D are estimated to be 36 mJ/molK2 and 347 K, respectively, γ of CuV 2S4 is much larger than that of CuTi2S 4, whereas CuV2S4 exhibits a CDW gap at low temperature. This enhancement of γ is probably attributed not only to the electron-phonon interaction but also to electron-electron interactions.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages1317-1318
Number of pages2
DOIs
Publication statusPublished - 2006 Dec 1
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Keywords

  • Charge density wave
  • CuVS
  • Specific heat
  • Spinel
  • Strongly correlated electron systems

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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