Microwave response in the antiferromagnetic insulating states of λ-(BEDT-TSF)2FeCl4

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

Research output: Contribution to journalConference articlepeer-review


We have measured the complex conductivity (σ*c1c+iσ2 c) along the c-axis in λ-(BEDT-TSF)2FeCl4 below the metal-to-insulator (MI) transition at TMI=8.3K. Microwave experiments have been carried out at 16.3 and 44.5GHz employing a cavity perturbation method. The temperature dependence of σ1c below TMI shows a large frequency dispersion, which could be attributed to a low energy excitation inside the gap such as a collective mode. With decreasing temperature, the real part of the dielectric constant 1c indicates a remarkable decrease at TMI.

Original languageEnglish
Pages (from-to)561-562
Number of pages2
JournalSynthetic Metals
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sep 102001 Sep 14


  • Dielectric
  • Metal- to-insulator transition
  • Microwave
  • λ-(BEDT-TSF)FeCl

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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