Time resolution of chirped lattice vibrations in a mixed-valence metal-halogen complex system

Fumito Araoka, Akira Ozawa, Daisuke Kawakami, Shinya Takaishi, Masahiro Yamashita, Takayoshi Kobayashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A quasi-one-dimensional metal-halogen complex, [Pt (en)2] [Pt (en)2 Br2] (Cl O4) 4, has been investigated by a pump-probe measurement using sub- 5-fs ultrashort white light pulses. The signal as a difference absorption was highly resolved both in time and frequency domains. By means of linear prediction-singular value decomposition calculation, four vibration modes, pairs of well-known and unknown modes, were retrieved, while almost no overtone was retrieved. Our analysis based on the dynamical matrix well explained the origin of one of the unknown modes. In addition, we found one more chirped low-frequency modulation in the slow-varying component of the signal, which is the first observation of a cluster motion of many lattice points and energy dissipation along the one-dimensional chain in this system.

Original languageEnglish
Article number224304
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number22
DOIs
Publication statusPublished - 2007 Jun 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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