Ultrafast infrared spectroscopic study of the photo-induced phase transition in (EDO-TTF)2PF6

Ken Onda; Tadahiko Ishikawa; Matthieu Chollet; Xiangfeng Shao; Hideki Yamochi; Gunzi Saito; Shin Ya Koshihara

doi:10.1088/1742-6596/21/1/036

Ultrafast infrared spectroscopic study of the photo-induced phase transition in (EDO-TTF)₂PF₆

Ken Onda, Tadahiko Ishikawa, Matthieu Chollet, Xiangfeng Shao, Hideki Yamochi, Gunzi Saito, Shin Ya Koshihara

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

We have measured ultrafast reflectivity changes of (EDO-TTF) ₂PF₆ in the infrared region (0.51 eV - 1.03 eV) after excitation with a 1.58 eV photon in order to reveal the mechanism of ultrafast photo-induced insulator-to-metal phase transition. We found that the temporal profiles of reflectivity change have two components: a faster component within 3 ps associated with a 1-ps or 0.5-ps period oscillation and a slower component lasting over hundreds of a picosecond. In addition, we found that the sign of a reflectivity change is often different from that expected from the thermally induced phase transition. These results indicate that the PIPT takes place via a complicated process due to strong electron and phonon coupling.

Original language	English
Pages (from-to)	216-220
Number of pages	5
Journal	Journal of Physics: Conference Series
Volume	21
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/21/1/036
Publication status	Published - Jan 1 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/21/1/036

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Onda, K., Ishikawa, T., Chollet, M., Shao, X., Yamochi, H., Saito, G., & Koshihara, S. Y. (2005). Ultrafast infrared spectroscopic study of the photo-induced phase transition in (EDO-TTF)₂PF₆. Journal of Physics: Conference Series, 21(1), 216-220. https://doi.org/10.1088/1742-6596/21/1/036

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abstract = "We have measured ultrafast reflectivity changes of (EDO-TTF) 2PF6 in the infrared region (0.51 eV - 1.03 eV) after excitation with a 1.58 eV photon in order to reveal the mechanism of ultrafast photo-induced insulator-to-metal phase transition. We found that the temporal profiles of reflectivity change have two components: a faster component within 3 ps associated with a 1-ps or 0.5-ps period oscillation and a slower component lasting over hundreds of a picosecond. In addition, we found that the sign of a reflectivity change is often different from that expected from the thermally induced phase transition. These results indicate that the PIPT takes place via a complicated process due to strong electron and phonon coupling.",

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AU - Onda, Ken

AU - Ishikawa, Tadahiko

AU - Chollet, Matthieu

AU - Shao, Xiangfeng

AU - Yamochi, Hideki

AU - Saito, Gunzi

AU - Koshihara, Shin Ya

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AB - We have measured ultrafast reflectivity changes of (EDO-TTF) 2PF6 in the infrared region (0.51 eV - 1.03 eV) after excitation with a 1.58 eV photon in order to reveal the mechanism of ultrafast photo-induced insulator-to-metal phase transition. We found that the temporal profiles of reflectivity change have two components: a faster component within 3 ps associated with a 1-ps or 0.5-ps period oscillation and a slower component lasting over hundreds of a picosecond. In addition, we found that the sign of a reflectivity change is often different from that expected from the thermally induced phase transition. These results indicate that the PIPT takes place via a complicated process due to strong electron and phonon coupling.

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