30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt

H. Nakaya; F. Hiramatsu; Y. Kawakami; S. Iwai; K. Yamamoto; K. Yakushi

doi:10.1016/j.jlumin.2007.12.020

30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt

H. Nakaya, F. Hiramatsu, Y. Kawakami, S. Iwai, K. Yamamoto, K. Yakushi

SCI - Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Primary dynamics of photo-induced melting of charge order (CO) and metallic domain formation in [bis(ethlylenedithio)] tetrathiafulvalene (BEDT-TTF) salts α-(BEDT-TTF)₂I₃ were studied using an infrared (1.4 μm) pump-probe spectroscopy with a time resolution of 30 fs. Faster (<30 fs) and slower (ca. 2 ps) responses of transient reflectivity accompanying the coherent phonon were detected. They are attributable to the local melting of CO and the stabilization of semi-macroscopic metallic domain, respectively. Moreover, the correlation time (τ_cor) of the photo-induced insulator to metal transition was also measured by double-pulse excitation. The observed τ_cor (0.4 ps) is shorter than the stabilization time of the semi-macroscopic metallic domain.

Original language	English
Pages (from-to)	1065-1068
Number of pages	4
Journal	Journal of Luminescence
Volume	128
Issue number	5-6
DOIs	https://doi.org/10.1016/j.jlumin.2007.12.020
Publication status	Published - 2008 May

Keywords

Charge order
Organic conductor
Ultrafast spectroscopy

ASJC Scopus subject areas

Biophysics
Biochemistry
Chemistry(all)
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.jlumin.2007.12.020

Cite this

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title = "30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt",

abstract = "Primary dynamics of photo-induced melting of charge order (CO) and metallic domain formation in [bis(ethlylenedithio)] tetrathiafulvalene (BEDT-TTF) salts α-(BEDT-TTF)2I3 were studied using an infrared (1.4 μm) pump-probe spectroscopy with a time resolution of 30 fs. Faster (<30 fs) and slower (ca. 2 ps) responses of transient reflectivity accompanying the coherent phonon were detected. They are attributable to the local melting of CO and the stabilization of semi-macroscopic metallic domain, respectively. Moreover, the correlation time (τcor) of the photo-induced insulator to metal transition was also measured by double-pulse excitation. The observed τcor (0.4 ps) is shorter than the stabilization time of the semi-macroscopic metallic domain.",

keywords = "Charge order, Organic conductor, Ultrafast spectroscopy",

author = "H. Nakaya and F. Hiramatsu and Y. Kawakami and S. Iwai and K. Yamamoto and K. Yakushi",

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doi = "10.1016/j.jlumin.2007.12.020",

language = "English",

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journal = "Journal of Luminescence",

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T1 - 30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt

AU - Nakaya, H.

AU - Hiramatsu, F.

AU - Kawakami, Y.

AU - Iwai, S.

AU - Yamamoto, K.

AU - Yakushi, K.

PY - 2008/5

Y1 - 2008/5

N2 - Primary dynamics of photo-induced melting of charge order (CO) and metallic domain formation in [bis(ethlylenedithio)] tetrathiafulvalene (BEDT-TTF) salts α-(BEDT-TTF)2I3 were studied using an infrared (1.4 μm) pump-probe spectroscopy with a time resolution of 30 fs. Faster (<30 fs) and slower (ca. 2 ps) responses of transient reflectivity accompanying the coherent phonon were detected. They are attributable to the local melting of CO and the stabilization of semi-macroscopic metallic domain, respectively. Moreover, the correlation time (τcor) of the photo-induced insulator to metal transition was also measured by double-pulse excitation. The observed τcor (0.4 ps) is shorter than the stabilization time of the semi-macroscopic metallic domain.

AB - Primary dynamics of photo-induced melting of charge order (CO) and metallic domain formation in [bis(ethlylenedithio)] tetrathiafulvalene (BEDT-TTF) salts α-(BEDT-TTF)2I3 were studied using an infrared (1.4 μm) pump-probe spectroscopy with a time resolution of 30 fs. Faster (<30 fs) and slower (ca. 2 ps) responses of transient reflectivity accompanying the coherent phonon were detected. They are attributable to the local melting of CO and the stabilization of semi-macroscopic metallic domain, respectively. Moreover, the correlation time (τcor) of the photo-induced insulator to metal transition was also measured by double-pulse excitation. The observed τcor (0.4 ps) is shorter than the stabilization time of the semi-macroscopic metallic domain.

KW - Charge order

KW - Organic conductor

KW - Ultrafast spectroscopy

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DO - 10.1016/j.jlumin.2007.12.020

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VL - 128

SP - 1065

EP - 1068

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

IS - 5-6

ER -

30 fs infrared spectroscopy of photo-induced phase transition in frac(1, 4) filling organic salt

Abstract

Keywords

ASJC Scopus subject areas

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