Charge and structural dynamics in photoinduced phase transition of (EDO-TTF) 2PF 6 examined by picosecond time-resolved vibrational spectroscopy

Naoto Fukazawa, Minoru Shimizu, Tadahiko Ishikawa, Yoichi Okimoto, Shin Ya Koshihara, Takaaki Hiramatsu, Yoshiaki Nakano, Hideki Yamochi, Gunzi Saito, Ken Onda

Research output: Contribution to journalArticle

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Abstract

Using time-resolved near-infrared reflectance spectroscopy and time-resolved mid-infrared vibrational spectroscopy, we studied photoinduced phase transition of the charge-ordered insulating phase in a charge-transfer complex (EDO-TTF) 2PF 6 (EDO-TTF: ethylenedioxy- tetrathiafulvalene) in the hundred picosecond range after photoexcitation. The temporal profiles at 0.83-1.03 eV, which are a characteristic of the photoinduced charge-disproportionate phase immediately after photoexcitation, suggested the formation of a new metastable phase in the hundred picosecond range. Time-resolved vibrational spectra at 1300-1700 cm -1, where charge- and structure-sensitive C=C stretching vibrational modes are located, elucidated that the nature of the new phase is very close to that of the high-temperature metallic phase and it takes about 100 ps for the new phase to emerge accompanied with charge and structure fluctuation.

Original languageEnglish
Pages (from-to)5892-5899
Number of pages8
JournalJournal of Physical Chemistry C
Volume116
Issue number9
DOIs
Publication statusPublished - Mar 8 2012

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Vibrational spectroscopy
dynamic structural analysis
Photoexcitation
Structural dynamics
Phase transitions
photoexcitation
Metastable phases
Vibrational spectra
spectroscopy
Stretching
Charge transfer
Infrared spectroscopy
Spectroscopy
Infrared radiation
vibrational spectra
vibration mode
charge transfer
reflectance
profiles
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Charge and structural dynamics in photoinduced phase transition of (EDO-TTF) 2PF 6 examined by picosecond time-resolved vibrational spectroscopy. / Fukazawa, Naoto; Shimizu, Minoru; Ishikawa, Tadahiko; Okimoto, Yoichi; Koshihara, Shin Ya; Hiramatsu, Takaaki; Nakano, Yoshiaki; Yamochi, Hideki; Saito, Gunzi; Onda, Ken.

In: Journal of Physical Chemistry C, Vol. 116, No. 9, 08.03.2012, p. 5892-5899.

Research output: Contribution to journalArticle

Fukazawa, N, Shimizu, M, Ishikawa, T, Okimoto, Y, Koshihara, SY, Hiramatsu, T, Nakano, Y, Yamochi, H, Saito, G & Onda, K 2012, 'Charge and structural dynamics in photoinduced phase transition of (EDO-TTF) 2PF 6 examined by picosecond time-resolved vibrational spectroscopy', Journal of Physical Chemistry C, vol. 116, no. 9, pp. 5892-5899. https://doi.org/10.1021/jp210708q
Fukazawa, Naoto ; Shimizu, Minoru ; Ishikawa, Tadahiko ; Okimoto, Yoichi ; Koshihara, Shin Ya ; Hiramatsu, Takaaki ; Nakano, Yoshiaki ; Yamochi, Hideki ; Saito, Gunzi ; Onda, Ken. / Charge and structural dynamics in photoinduced phase transition of (EDO-TTF) 2PF 6 examined by picosecond time-resolved vibrational spectroscopy. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 9. pp. 5892-5899.
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AU - Koshihara, Shin Ya

AU - Hiramatsu, Takaaki

AU - Nakano, Yoshiaki

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