Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA

S. Iwai, S. Tanaka, K. Fujinuma, H. Kishida, H. Okamoto, Y. Tokura

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Initial dynamics of photo-induced ionic (I) to neutral (N) phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) was investigated by femtosecond reflection spectroscopy with various excitation intensities. A charge transfer excitation in the I phase produces N donor (D0)-acceptor (A 0) strings within 2 ps. For a weak excitation intensity, these initial N states decay with a life time of 300 ps at 4 K., but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature TNI. Near TNI, we also found the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.

本文言語English
ページ(範囲)807-813
ページ数7
ジャーナルPhase Transitions
75
7-8
DOI
出版ステータスPublished - 2002 1月 1
外部発表はい

ASJC Scopus subject areas

  • 器械工学
  • 材料科学(全般)

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