Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions

Y. Takahashi; T. Hasegawa; T. Akutagawa; T. Nakamura

doi:10.1051/jp4:2004114032

Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions

Y. Takahashi, T. Hasegawa, T. Akutagawa, T. Nakamura

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

1 Citation (Scopus)

Abstract

We have studied dielectric properties of (BEDT-TTF)(ClMeTCNQ) around the neutralionic (NI) transitions, whose critical temperatures can be tuned from 300 K to 0 K by variation of pressure in the range between 0.25 - 1.0 GPa. We found that thermal-activation-type dielectric response becomes predominant around the transitions higher than 50 K, while Curie-Weiss type enhancement was not detected above the transitions. Here we feature the dielectric properties in the range above 50 K, so as to contrast another type of dielectrical enhancement observed around the quantum critical point of the NT valence instabilities in (BEDT-TTF)(ClMeTCNQ).

Original language	English
Pages (from-to)	137-139
Number of pages	3
Journal	Journal De Physique. IV : JP
Volume	114
DOIs	https://doi.org/10.1051/jp4:2004114032
Publication status	Published - 2004
Externally published	Yes
Event	ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets - Port-Bourgenay, France Duration: 2003 Sept 21 → 2003 Sept 26

Keywords

Charge-transfer complex
Dielectric properties
Neutral-ionic phase transition

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1051/jp4:2004114032

Cite this

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title = "Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions",

abstract = "We have studied dielectric properties of (BEDT-TTF)(ClMeTCNQ) around the neutralionic (NI) transitions, whose critical temperatures can be tuned from 300 K to 0 K by variation of pressure in the range between 0.25 - 1.0 GPa. We found that thermal-activation-type dielectric response becomes predominant around the transitions higher than 50 K, while Curie-Weiss type enhancement was not detected above the transitions. Here we feature the dielectric properties in the range above 50 K, so as to contrast another type of dielectrical enhancement observed around the quantum critical point of the NT valence instabilities in (BEDT-TTF)(ClMeTCNQ).",

keywords = "Charge-transfer complex, Dielectric properties, Neutral-ionic phase transition",

author = "Y. Takahashi and T. Hasegawa and T. Akutagawa and T. Nakamura",

year = "2004",

doi = "10.1051/jp4:2004114032",

language = "English",

volume = "114",

pages = "137--139",

journal = "European Physical Journal: Special Topics",

issn = "1951-6355",

publisher = "Springer Verlag",

note = "ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets ; Conference date: 21-09-2003 Through 26-09-2003",

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TY - JOUR

T1 - Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions

AU - Takahashi, Y.

AU - Hasegawa, T.

AU - Akutagawa, T.

AU - Nakamura, T.

PY - 2004

Y1 - 2004

N2 - We have studied dielectric properties of (BEDT-TTF)(ClMeTCNQ) around the neutralionic (NI) transitions, whose critical temperatures can be tuned from 300 K to 0 K by variation of pressure in the range between 0.25 - 1.0 GPa. We found that thermal-activation-type dielectric response becomes predominant around the transitions higher than 50 K, while Curie-Weiss type enhancement was not detected above the transitions. Here we feature the dielectric properties in the range above 50 K, so as to contrast another type of dielectrical enhancement observed around the quantum critical point of the NT valence instabilities in (BEDT-TTF)(ClMeTCNQ).

AB - We have studied dielectric properties of (BEDT-TTF)(ClMeTCNQ) around the neutralionic (NI) transitions, whose critical temperatures can be tuned from 300 K to 0 K by variation of pressure in the range between 0.25 - 1.0 GPa. We found that thermal-activation-type dielectric response becomes predominant around the transitions higher than 50 K, while Curie-Weiss type enhancement was not detected above the transitions. Here we feature the dielectric properties in the range above 50 K, so as to contrast another type of dielectrical enhancement observed around the quantum critical point of the NT valence instabilities in (BEDT-TTF)(ClMeTCNQ).

KW - Charge-transfer complex

KW - Dielectric properties

KW - Neutral-ionic phase transition

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DO - 10.1051/jp4:2004114032

M3 - Conference article

AN - SCOPUS:33645155509

SN - 1951-6355

VL - 114

SP - 137

EP - 139

JO - European Physical Journal: Special Topics

JF - European Physical Journal: Special Topics

T2 - ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets

Y2 - 21 September 2003 through 26 September 2003

ER -

Enhanced dielectric response in (BEDT-TTF) (CIMeTCNQ) at the neutral-ionic phase transitions

Abstract

Keywords

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