High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)2AuCl2

Hiromi Taniguchi; Masashi Miyashita; Kenichi Uchiyama; Ryosuke Sato; Yasuyuki Ishii; Kazuhiko Satoh; Nobuo Môri; Masato Hedo; Yoshiya Uwatoko

doi:10.1143/JPSJ.74.1370

High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)₂AuCl₂

Hiromi Taniguchi, Masashi Miyashita, Kenichi Uchiyama, Ryosuke Sato, Yasuyuki Ishii, Kazuhiko Satoh, Nobuo Môri, Masato Hedo, Yoshiya Uwatoko

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

9 Citations (Scopus)

Abstract

We have investigated the resistivity of an organic Mott insulator, β′-(BEDT-TTF)₂AuCl₂, under extremely high pressures of up to 9.9 GPa, using the cubic anvil press, motivated by the fact that a related material, β′-(BEDT-TTF)₂ICl₂, shows the highest transition-temperature superconductivity among organics at 8.2 GPa. Through characterization by resistivity and susceptibility measurements at ambient pressure, we have confirmed that these two salts have common physical properties. Nevertheless, β′-(BEDT-TTF)₂AuCl₂ does not show superconductivity but remains semiconducting up to 9.9 GPa. We discuss the origin of these contrasting behaviors and suggest the cause to be the difference in anion size between the two salts.

Original language	English
Pages (from-to)	1370-1373
Number of pages	4
Journal	journal of the physical society of japan
Volume	74
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.74.1370
Publication status	Published - 2005 May
Externally published	Yes

Keywords

Crystal structure
Cubic anvil press
High pressure
Organic superconductor

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.74.1370

Cite this

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title = "High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)2AuCl2",

abstract = "We have investigated the resistivity of an organic Mott insulator, β′-(BEDT-TTF)2AuCl2, under extremely high pressures of up to 9.9 GPa, using the cubic anvil press, motivated by the fact that a related material, β′-(BEDT-TTF)2ICl2, shows the highest transition-temperature superconductivity among organics at 8.2 GPa. Through characterization by resistivity and susceptibility measurements at ambient pressure, we have confirmed that these two salts have common physical properties. Nevertheless, β′-(BEDT-TTF)2AuCl2 does not show superconductivity but remains semiconducting up to 9.9 GPa. We discuss the origin of these contrasting behaviors and suggest the cause to be the difference in anion size between the two salts.",

keywords = "Crystal structure, Cubic anvil press, High pressure, Organic superconductor",

author = "Hiromi Taniguchi and Masashi Miyashita and Kenichi Uchiyama and Ryosuke Sato and Yasuyuki Ishii and Kazuhiko Satoh and Nobuo M{\^o}ri and Masato Hedo and Yoshiya Uwatoko",

year = "2005",

month = may,

doi = "10.1143/JPSJ.74.1370",

language = "English",

volume = "74",

pages = "1370--1373",

journal = "Journal of the Physical Society of Japan",

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T1 - High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)2AuCl2

AU - Taniguchi, Hiromi

AU - Miyashita, Masashi

AU - Uchiyama, Kenichi

AU - Sato, Ryosuke

AU - Ishii, Yasuyuki

AU - Satoh, Kazuhiko

AU - Môri, Nobuo

AU - Hedo, Masato

AU - Uwatoko, Yoshiya

PY - 2005/5

Y1 - 2005/5

N2 - We have investigated the resistivity of an organic Mott insulator, β′-(BEDT-TTF)2AuCl2, under extremely high pressures of up to 9.9 GPa, using the cubic anvil press, motivated by the fact that a related material, β′-(BEDT-TTF)2ICl2, shows the highest transition-temperature superconductivity among organics at 8.2 GPa. Through characterization by resistivity and susceptibility measurements at ambient pressure, we have confirmed that these two salts have common physical properties. Nevertheless, β′-(BEDT-TTF)2AuCl2 does not show superconductivity but remains semiconducting up to 9.9 GPa. We discuss the origin of these contrasting behaviors and suggest the cause to be the difference in anion size between the two salts.

AB - We have investigated the resistivity of an organic Mott insulator, β′-(BEDT-TTF)2AuCl2, under extremely high pressures of up to 9.9 GPa, using the cubic anvil press, motivated by the fact that a related material, β′-(BEDT-TTF)2ICl2, shows the highest transition-temperature superconductivity among organics at 8.2 GPa. Through characterization by resistivity and susceptibility measurements at ambient pressure, we have confirmed that these two salts have common physical properties. Nevertheless, β′-(BEDT-TTF)2AuCl2 does not show superconductivity but remains semiconducting up to 9.9 GPa. We discuss the origin of these contrasting behaviors and suggest the cause to be the difference in anion size between the two salts.

KW - Crystal structure

KW - Cubic anvil press

KW - High pressure

KW - Organic superconductor

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