Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure

T. Hasegawa, T. Akutagawa, T. Nakamura, T. Mochida, Ryusuke Kondo, S. Kagoshima, Y. Iwasa

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Observation and characterization are reported on a neutral-ionic (NI) phase transition under pressure in (BEDT-TTF)(ClMeTCNQ), which is a mixed-stack charge-transfer compound with BEDT-TTF-based intercolumnar networks. Optical and electrical experiments revealed that the compound undergoes a pressure-induced NI transition at 1 GPa at room temperature. The temperature-pressure phase diagram of this phase transition was established by the electrical resistivity measurements at low temperature under pressure. The observed symmetry breaking in the infrared spectra and dramatic decrease of resistivity indicate that the NI transition in (BEDT-TTF)(ClMeTCNQ) at 1 GPa at room temperature is qualitatively similar in nature to that in the standard material (TTF)(CA). In contrast, the NI transition in (BEDT-TTF)(ClMeTCNQ) at low temperature under lower pressure considerably differs from that in (TTF)(CA) as to the resistivity behaviors around the phase boundary: The former becomes almost continuous without showing any anomaly, while the latter is significantly discontinuous. We discuss the origin of the observed electrical behaviors in (BEDT-TTF) (ClMeTCNQ) in terms of the effect of intercolumnar interaction associated with BEDT-TTF moieties.

Original languageEnglish
Article number085106
Pages (from-to)851061-851067
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number8
Publication statusPublished - Aug 15 2001
Externally publishedYes

Fingerprint

Phase transitions
electrical resistivity
Temperature
Phase boundaries
room temperature
Phase diagrams
Charge transfer
broken symmetry
infrared spectra
low pressure
charge transfer
phase diagrams
BEDT-TTF
anomalies
Infrared radiation
Experiments
interactions
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Hasegawa, T., Akutagawa, T., Nakamura, T., Mochida, T., Kondo, R., Kagoshima, S., & Iwasa, Y. (2001). Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure. Physical Review B - Condensed Matter and Materials Physics, 64(8), 851061-851067. [085106].

Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure. / Hasegawa, T.; Akutagawa, T.; Nakamura, T.; Mochida, T.; Kondo, Ryusuke; Kagoshima, S.; Iwasa, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 8, 085106, 15.08.2001, p. 851061-851067.

Research output: Contribution to journalArticle

Hasegawa, T, Akutagawa, T, Nakamura, T, Mochida, T, Kondo, R, Kagoshima, S & Iwasa, Y 2001, 'Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure', Physical Review B - Condensed Matter and Materials Physics, vol. 64, no. 8, 085106, pp. 851061-851067.
Hasegawa T, Akutagawa T, Nakamura T, Mochida T, Kondo R, Kagoshima S et al. Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure. Physical Review B - Condensed Matter and Materials Physics. 2001 Aug 15;64(8):851061-851067. 085106.
Hasegawa, T. ; Akutagawa, T. ; Nakamura, T. ; Mochida, T. ; Kondo, Ryusuke ; Kagoshima, S. ; Iwasa, Y. / Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure. In: Physical Review B - Condensed Matter and Materials Physics. 2001 ; Vol. 64, No. 8. pp. 851061-851067.
@article{97bdabe568e742239ed53679b6c2d6af,
title = "Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure",
abstract = "Observation and characterization are reported on a neutral-ionic (NI) phase transition under pressure in (BEDT-TTF)(ClMeTCNQ), which is a mixed-stack charge-transfer compound with BEDT-TTF-based intercolumnar networks. Optical and electrical experiments revealed that the compound undergoes a pressure-induced NI transition at 1 GPa at room temperature. The temperature-pressure phase diagram of this phase transition was established by the electrical resistivity measurements at low temperature under pressure. The observed symmetry breaking in the infrared spectra and dramatic decrease of resistivity indicate that the NI transition in (BEDT-TTF)(ClMeTCNQ) at 1 GPa at room temperature is qualitatively similar in nature to that in the standard material (TTF)(CA). In contrast, the NI transition in (BEDT-TTF)(ClMeTCNQ) at low temperature under lower pressure considerably differs from that in (TTF)(CA) as to the resistivity behaviors around the phase boundary: The former becomes almost continuous without showing any anomaly, while the latter is significantly discontinuous. We discuss the origin of the observed electrical behaviors in (BEDT-TTF) (ClMeTCNQ) in terms of the effect of intercolumnar interaction associated with BEDT-TTF moieties.",
author = "T. Hasegawa and T. Akutagawa and T. Nakamura and T. Mochida and Ryusuke Kondo and S. Kagoshima and Y. Iwasa",
year = "2001",
month = "8",
day = "15",
language = "English",
volume = "64",
pages = "851061--851067",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "8",

}

TY - JOUR

T1 - Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure

AU - Hasegawa, T.

AU - Akutagawa, T.

AU - Nakamura, T.

AU - Mochida, T.

AU - Kondo, Ryusuke

AU - Kagoshima, S.

AU - Iwasa, Y.

PY - 2001/8/15

Y1 - 2001/8/15

N2 - Observation and characterization are reported on a neutral-ionic (NI) phase transition under pressure in (BEDT-TTF)(ClMeTCNQ), which is a mixed-stack charge-transfer compound with BEDT-TTF-based intercolumnar networks. Optical and electrical experiments revealed that the compound undergoes a pressure-induced NI transition at 1 GPa at room temperature. The temperature-pressure phase diagram of this phase transition was established by the electrical resistivity measurements at low temperature under pressure. The observed symmetry breaking in the infrared spectra and dramatic decrease of resistivity indicate that the NI transition in (BEDT-TTF)(ClMeTCNQ) at 1 GPa at room temperature is qualitatively similar in nature to that in the standard material (TTF)(CA). In contrast, the NI transition in (BEDT-TTF)(ClMeTCNQ) at low temperature under lower pressure considerably differs from that in (TTF)(CA) as to the resistivity behaviors around the phase boundary: The former becomes almost continuous without showing any anomaly, while the latter is significantly discontinuous. We discuss the origin of the observed electrical behaviors in (BEDT-TTF) (ClMeTCNQ) in terms of the effect of intercolumnar interaction associated with BEDT-TTF moieties.

AB - Observation and characterization are reported on a neutral-ionic (NI) phase transition under pressure in (BEDT-TTF)(ClMeTCNQ), which is a mixed-stack charge-transfer compound with BEDT-TTF-based intercolumnar networks. Optical and electrical experiments revealed that the compound undergoes a pressure-induced NI transition at 1 GPa at room temperature. The temperature-pressure phase diagram of this phase transition was established by the electrical resistivity measurements at low temperature under pressure. The observed symmetry breaking in the infrared spectra and dramatic decrease of resistivity indicate that the NI transition in (BEDT-TTF)(ClMeTCNQ) at 1 GPa at room temperature is qualitatively similar in nature to that in the standard material (TTF)(CA). In contrast, the NI transition in (BEDT-TTF)(ClMeTCNQ) at low temperature under lower pressure considerably differs from that in (TTF)(CA) as to the resistivity behaviors around the phase boundary: The former becomes almost continuous without showing any anomaly, while the latter is significantly discontinuous. We discuss the origin of the observed electrical behaviors in (BEDT-TTF) (ClMeTCNQ) in terms of the effect of intercolumnar interaction associated with BEDT-TTF moieties.

UR - http://www.scopus.com/inward/record.url?scp=0035880979&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035880979&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0035880979

VL - 64

SP - 851061

EP - 851067

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 8

M1 - 085106

ER -