Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions

Y. Takahashi, T. Hasegawa, T. Akutagawa, T. Nakamura

Research output: Contribution to journalConference articlepeer-review

Abstract

We have studied dielectric properties of (BEDT-TTF)(ClMeTCNQ) around the neutralionic (NI) transitions, whose critical temperatures can be tuned from 300 K to 0 K by variation of pressure in the range between 0.25 - 1.0 GPa. We found that thermal-activation-type dielectric response becomes predominant around the transitions higher than 50 K, while Curie-Weiss type enhancement was not detected above the transitions. Here we feature the dielectric properties in the range above 50 K, so as to contrast another type of dielectrical enhancement observed around the quantum critical point of the NT valence instabilities in (BEDT-TTF)(ClMeTCNQ).

Original languageEnglish
Pages (from-to)137-139
Number of pages3
JournalJournal De Physique. IV : JP
Volume114
DOIs
Publication statusPublished - 2004 Dec 1
Externally publishedYes
EventISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets - Port-Bourgenay, France
Duration: 2003 Sep 212003 Sep 26

Keywords

  • Charge-transfer complex
  • Dielectric properties
  • Neutral-ionic phase transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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