Optical spectroscopy of the neutral-ionic phase transition in a charge-transfer complex: TTF and tetrahalo-p-benzoquinones

Y. Okimoto; S. Horiuchi; E. Saitoh; R. Kumai; H. Okamoto; Y. Tokura

doi:10.1016/S0379-6779(02)00443-5

Optical spectroscopy of the neutral-ionic phase transition in a charge-transfer complex: TTF and tetrahalo-p-benzoquinones

Y. Okimoto, S. Horiuchi, E. Saitoh, R. Kumai, H. Okamoto, Y. Tokura

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Far-infrared reflectivity spectra have been investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone, which undergoes a neutral-ionic (N-I) transition at T_c = 68 K. With decrease in temperature toward T_c, the far-infrared reflectivity spectrum is gradually transformed into a Drude-like high reflectance band edging around 100 cm^-1, and the optical conductivity shows an anomalous peak around 10 cm^-1. The far-infrared anomaly is related to the gigantic dielectric response just above T_c, which are both discussed in terms of dynamics of N-I domain walls with fractional charge.

Original language	English
Pages (from-to)	637-639
Number of pages	3
Journal	Synthetic Metals
Volume	133-134
DOIs	https://doi.org/10.1016/S0379-6779(02)00443-5
Publication status	Published - 2003 Mar 13
Event	ISCOM 2001 - Rusutsu, Hokkaido, Japan Duration: 2001 Sep 10 → 2001 Sep 14

Keywords

Neutral-ionic domain wall
Neutral-ionic transition
Optical conductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(02)00443-5

Cite this

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title = "Optical spectroscopy of the neutral-ionic phase transition in a charge-transfer complex: TTF and tetrahalo-p-benzoquinones",

abstract = "Far-infrared reflectivity spectra have been investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone, which undergoes a neutral-ionic (N-I) transition at Tc = 68 K. With decrease in temperature toward Tc, the far-infrared reflectivity spectrum is gradually transformed into a Drude-like high reflectance band edging around 100 cm-1, and the optical conductivity shows an anomalous peak around 10 cm-1. The far-infrared anomaly is related to the gigantic dielectric response just above Tc, which are both discussed in terms of dynamics of N-I domain walls with fractional charge.",

keywords = "Neutral-ionic domain wall, Neutral-ionic transition, Optical conductivity",

author = "Y. Okimoto and S. Horiuchi and E. Saitoh and R. Kumai and H. Okamoto and Y. Tokura",

year = "2003",

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doi = "10.1016/S0379-6779(02)00443-5",

language = "English",

volume = "133-134",

pages = "637--639",

journal = "Synthetic Metals",

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note = "ISCOM 2001 ; Conference date: 10-09-2001 Through 14-09-2001",

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TY - JOUR

T1 - Optical spectroscopy of the neutral-ionic phase transition in a charge-transfer complex

T2 - ISCOM 2001

AU - Okimoto, Y.

AU - Horiuchi, S.

AU - Saitoh, E.

AU - Kumai, R.

AU - Okamoto, H.

AU - Tokura, Y.

PY - 2003/3/13

Y1 - 2003/3/13

N2 - Far-infrared reflectivity spectra have been investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone, which undergoes a neutral-ionic (N-I) transition at Tc = 68 K. With decrease in temperature toward Tc, the far-infrared reflectivity spectrum is gradually transformed into a Drude-like high reflectance band edging around 100 cm-1, and the optical conductivity shows an anomalous peak around 10 cm-1. The far-infrared anomaly is related to the gigantic dielectric response just above Tc, which are both discussed in terms of dynamics of N-I domain walls with fractional charge.

AB - Far-infrared reflectivity spectra have been investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone, which undergoes a neutral-ionic (N-I) transition at Tc = 68 K. With decrease in temperature toward Tc, the far-infrared reflectivity spectrum is gradually transformed into a Drude-like high reflectance band edging around 100 cm-1, and the optical conductivity shows an anomalous peak around 10 cm-1. The far-infrared anomaly is related to the gigantic dielectric response just above Tc, which are both discussed in terms of dynamics of N-I domain walls with fractional charge.

KW - Neutral-ionic domain wall

KW - Neutral-ionic transition

KW - Optical conductivity

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U2 - 10.1016/S0379-6779(02)00443-5

DO - 10.1016/S0379-6779(02)00443-5

M3 - Conference article

AN - SCOPUS:0037435227

VL - 133-134

SP - 637

EP - 639

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

Y2 - 10 September 2001 through 14 September 2001

ER -

Optical spectroscopy of the neutral-ionic phase transition in a charge-transfer complex: TTF and tetrahalo-p-benzoquinones

Abstract

Keywords

ASJC Scopus subject areas

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