Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)2(X2TCNQ)[X=Cl, Br]

Ryusuke Kondo; Tatsuo Hasegawa; Tomoyuki Mochida; Seiichi Kagoshima; Yoshihiro Iwasa; Ko Ichi Hiraki; Toshihiro Takahashi

doi:10.1143/JPSJ.70.3023

Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)₂(X₂TCNQ)[X=Cl, Br]

Ryusuke Kondo, Tatsuo Hasegawa, Tomoyuki Mochida, Seiichi Kagoshima, Yoshihiro Iwasa, Ko Ichi Hiraki, Toshihiro Takahashi

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

6 Citations (Scopus)

Abstract

Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)₂(X₂TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and ¹H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)₂(Cl₂TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.

Original language	English
Pages (from-to)	3023-3030
Number of pages	8
Journal	journal of the physical society of japan
Volume	70
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.70.3023
Publication status	Published - Oct 2001
Externally published	Yes

Keywords

Metal-insulator transition
Organic superconductor
Superconducting transition

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.70.3023

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Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)₂(X₂TCNQ)[X=Cl, Br]. / Kondo, Ryusuke; Hasegawa, Tatsuo; Mochida, Tomoyuki; Kagoshima, Seiichi; Iwasa, Yoshihiro; Hiraki, Ko Ichi; Takahashi, Toshihiro.

In: journal of the physical society of japan, Vol. 70, No. 10, 10.2001, p. 3023-3030.

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

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title = "Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)2(X2TCNQ)[X=Cl, Br]",

abstract = "Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)2(X2TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)2(Cl2TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.",

keywords = "Metal-insulator transition, Organic superconductor, Superconducting transition",

author = "Ryusuke Kondo and Tatsuo Hasegawa and Tomoyuki Mochida and Seiichi Kagoshima and Yoshihiro Iwasa and Hiraki, {Ko Ichi} and Toshihiro Takahashi",

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AU - Kondo, Ryusuke

AU - Hasegawa, Tatsuo

AU - Mochida, Tomoyuki

AU - Kagoshima, Seiichi

AU - Iwasa, Yoshihiro

AU - Hiraki, Ko Ichi

AU - Takahashi, Toshihiro

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N2 - Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)2(X2TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)2(Cl2TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.

AB - Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)2(X2TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)2(Cl2TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.

KW - Metal-insulator transition

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KW - Superconducting transition

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