Ultrafast optical responses in a one-dimensional mott insulator of a Br-bridged Ni compound

Tatsuzo Miyagoe, Shoichi Tao, Atsushi Maeda, Hiroyuki Matsuzaki, Hideki Ohtsu, Miki Hasegawa, Shinya Takaishi, Masahiro Yamashita, Hiroshi Okamoto

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We investigated the ultrafast optical responses of a one-dimensional (1D) Mott insulator by applying fs pump-probe absorption spectroscopy on a thin film sample of a Br-bridged Ni compound. Transient absorption changes and their excitation-energy dependences reveal that the responses consist of three components; coherent responses, responses of excitons and charge carriers. The decay time of excitons is very small (∼1.4 ps), which is characteristic of 1D Mott insulators. The relatively slow relaxation of charge carriers with several tens of picoseconds is attributable to polaronic effects.

Original languageEnglish
Article number023711
Journaljournal of the physical society of japan
Volume77
Issue number2
DOIs
Publication statusPublished - 2008 Feb

Keywords

  • Exciton
  • Femtosecond
  • Mott insulator
  • Pump-probe spectroscopy
  • Transition metal complex

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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