30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt

H. Nakaya, F. Hiramatsu, Y. Kawakami, S. Iwai, K. Yamamoto, K. Yakushi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Primary dynamics of photo-induced melting of charge order (CO) and metallic domain formation in [bis(ethlylenedithio)] tetrathiafulvalene (BEDT-TTF) salts α-(BEDT-TTF)2I3 were studied using an infrared (1.4 μm) pump-probe spectroscopy with a time resolution of 30 fs. Faster (<30 fs) and slower (ca. 2 ps) responses of transient reflectivity accompanying the coherent phonon were detected. They are attributable to the local melting of CO and the stabilization of semi-macroscopic metallic domain, respectively. Moreover, the correlation time (τcor) of the photo-induced insulator to metal transition was also measured by double-pulse excitation. The observed τcor (0.4 ps) is shorter than the stabilization time of the semi-macroscopic metallic domain.

Original languageEnglish
Pages (from-to)1065-1068
Number of pages4
JournalJournal of Luminescence
Volume128
Issue number5-6
DOIs
Publication statusPublished - 2008 May

Keywords

  • Charge order
  • Organic conductor
  • Ultrafast spectroscopy

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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