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

doi:10.1143/JPSJ.77.023711

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

SCI - Chemistry

Research output: Contribution to journal › Article › peer-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 language	English
Article number	023711
Journal	Journal of the Physical Society of Japan
Volume	77
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.77.023711
Publication status	Published - 2008 Feb

Keywords

Exciton
Femtosecond
Mott insulator
Pump-probe spectroscopy
Transition metal complex

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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.",

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AU - Miyagoe, Tatsuzo

AU - Tao, Shoichi

AU - Maeda, Atsushi

AU - Matsuzaki, Hiroyuki

AU - Ohtsu, Hideki

AU - Hasegawa, Miki

AU - Takaishi, Shinya

AU - Yamashita, Masahiro

AU - Okamoto, Hiroshi

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AB - 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.

KW - Exciton

KW - Femtosecond

KW - Mott insulator

KW - Pump-probe spectroscopy

KW - Transition metal complex

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

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Keywords

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