Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA

S. Iwai; S. Tanaka; K. Fujinuma; H. Kishida; H. Okamoto; Y. Tokura

doi:10.1080/01411590290033921

Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA

S. Iwai, S. Tanaka, K. Fujinuma, H. Kishida, H. Okamoto, Y. Tokura

SCI - Physics

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

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Abstract

Initial dynamics of photo-induced ionic (I) to neutral (N) phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) was investigated by femtosecond reflection spectroscopy with various excitation intensities. A charge transfer excitation in the I phase produces N donor (D⁰)-acceptor (A ⁰) strings within 2 ps. For a weak excitation intensity, these initial N states decay with a life time of 300 ps at 4 K., but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature T_NI. Near T_NI, we also found the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.

Original language	English
Pages (from-to)	807-813
Number of pages	7
Journal	Phase Transitions
Volume	75
Issue number	7-8
DOIs	https://doi.org/10.1080/01411590290033921
Publication status	Published - 2002 Jan 1

Keywords

Charge transfer complex
Coherent motion
Neutral-Ionic domain wall
Photo-induced phase transition
Ultrafast phenomena

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10.1080/01411590290033921

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title = "Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA",

abstract = "Initial dynamics of photo-induced ionic (I) to neutral (N) phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) was investigated by femtosecond reflection spectroscopy with various excitation intensities. A charge transfer excitation in the I phase produces N donor (D0)-acceptor (A 0) strings within 2 ps. For a weak excitation intensity, these initial N states decay with a life time of 300 ps at 4 K., but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature TNI. Near TNI, we also found the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.",

keywords = "Charge transfer complex, Coherent motion, Neutral-Ionic domain wall, Photo-induced phase transition, Ultrafast phenomena",

author = "S. Iwai and S. Tanaka and K. Fujinuma and H. Kishida and H. Okamoto and Y. Tokura",

note = "Funding Information: This work was supported by a grant-in-aid from Ministry of Education, Science, Sports, and Culture of Japan.",

year = "2002",

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doi = "10.1080/01411590290033921",

language = "English",

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journal = "Phase Transitions",

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TY - JOUR

T1 - Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA

AU - Iwai, S.

AU - Tanaka, S.

AU - Fujinuma, K.

AU - Kishida, H.

AU - Okamoto, H.

AU - Tokura, Y.

N1 - Funding Information: This work was supported by a grant-in-aid from Ministry of Education, Science, Sports, and Culture of Japan.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Initial dynamics of photo-induced ionic (I) to neutral (N) phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) was investigated by femtosecond reflection spectroscopy with various excitation intensities. A charge transfer excitation in the I phase produces N donor (D0)-acceptor (A 0) strings within 2 ps. For a weak excitation intensity, these initial N states decay with a life time of 300 ps at 4 K., but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature TNI. Near TNI, we also found the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.

AB - Initial dynamics of photo-induced ionic (I) to neutral (N) phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) was investigated by femtosecond reflection spectroscopy with various excitation intensities. A charge transfer excitation in the I phase produces N donor (D0)-acceptor (A 0) strings within 2 ps. For a weak excitation intensity, these initial N states decay with a life time of 300 ps at 4 K., but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature TNI. Near TNI, we also found the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.

KW - Charge transfer complex

KW - Coherent motion

KW - Neutral-Ionic domain wall

KW - Photo-induced phase transition

KW - Ultrafast phenomena

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DO - 10.1080/01411590290033921

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VL - 75

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EP - 813

JO - Phase Transitions

JF - Phase Transitions

IS - 7-8

ER -

Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA

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Keywords

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