Dielectric response in the metallic states of λ-(BEDT-TSF)2FeCl4

H. Matsui, H. Tsuchiya, H. Uozaki, Y. Abe, Y. Ishizaki, E. Negishi, S. Endo, N. Toyota

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The microwave conductivity σ1c and dielectric constant 1c along the c-axis in λ-(BEDT-TSF)2FeCl4 have been obtained by a cavity perturbation technique with TE011 resonant mode at 16.3GHz. Even though the d.c. resistivity indicates a highly metallic state, we have found a novel dielectric response in 1c amounting to the order of 103 from the metal-to-insulator transition temperature TMI=8.3K to TFM=70K, at which the noticeable specific-heat jump and 1H NMR spectral splitting have been recently observed. The dielectric anomaly is attributed to the dynamical response of π-electron's charge degrees of freedom and could be interrelated to the π-d interaction.

Original languageEnglish
Pages (from-to)559-560
Number of pages2
JournalSynthetic Metals
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sept 102001 Sept 14


  • Charge disproportionation
  • Dielectric function
  • Metal-to-insulator transition
  • Microwave
  • λ-(BEDT-TSF)FeCl
  • π-d interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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