Highly conducting 1:1 radical cation salts: (DMTSA)X with X = NO3 and BF4

Kazushige Kawabata; Motoki Yanai; Takashi Sambongi; Yoshio Aso; Kazuo Takimiya; Tetsuo Otsubo

doi:10.1080/10587259708032321

Highly conducting 1:1 radical cation salts: (DMTSA)X with X = NO₃ and BF₄

Kazushige Kawabata, Motoki Yanai, Takashi Sambongi, Yoshio Aso, Kazuo Takimiya, Tetsuo Otsubo

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

11 Citations (Scopus)

Abstract

(DMTSA)NO₃ and -BF₄ show high conductivity at room temperature, in spite of fully ionic salt of 1:1 stoichiometry with uniform segregated stack column structure. DMTSA denotes 2,3-dimethyltetraseleno-anthracene. The NO₃ salt is semiconducting below room temperature, and the BF₄ salt is metallic above 220 K and semiconducting at lower temperatures. We found that their magnetic susceptibility is paramagnetic and independent of temperature from 300 K down to 10 K in common. The obtained magnetic property can not be attributed to conduction electrons but discussed in terms of Mott insulating state. Furthermore, high pressure experiment reveals that the NO₃ salt is not semiconducting but rather semi-metallic, and more that the BF₄ salt shows a small conductive anomaly around 70 K and maintains metallic at low temperatures under the pressure of 0.5 GPa.

Original language	English
Pages (from-to)	197-204
Number of pages	8
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	296
DOIs	https://doi.org/10.1080/10587259708032321
Publication status	Published - 1997
Externally published	Yes

Keywords

DMTSA
Electron correlation
Magnetic property
Mott insulator
Organic metal

ASJC Scopus subject areas

Condensed Matter Physics

Access to Document

10.1080/10587259708032321

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Highly conducting 1:1 radical cation salts : (DMTSA)X with X = NO₃ and BF₄. / Kawabata, Kazushige; Yanai, Motoki; Sambongi, Takashi; Aso, Yoshio; Takimiya, Kazuo; Otsubo, Tetsuo.

In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 296, 1997, p. 197-204.

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

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AU - Kawabata, Kazushige

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AU - Sambongi, Takashi

AU - Aso, Yoshio

AU - Takimiya, Kazuo

AU - Otsubo, Tetsuo

PY - 1997

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N2 - (DMTSA)NO3 and -BF4 show high conductivity at room temperature, in spite of fully ionic salt of 1:1 stoichiometry with uniform segregated stack column structure. DMTSA denotes 2,3-dimethyltetraseleno-anthracene. The NO3 salt is semiconducting below room temperature, and the BF4 salt is metallic above 220 K and semiconducting at lower temperatures. We found that their magnetic susceptibility is paramagnetic and independent of temperature from 300 K down to 10 K in common. The obtained magnetic property can not be attributed to conduction electrons but discussed in terms of Mott insulating state. Furthermore, high pressure experiment reveals that the NO3 salt is not semiconducting but rather semi-metallic, and more that the BF4 salt shows a small conductive anomaly around 70 K and maintains metallic at low temperatures under the pressure of 0.5 GPa.

AB - (DMTSA)NO3 and -BF4 show high conductivity at room temperature, in spite of fully ionic salt of 1:1 stoichiometry with uniform segregated stack column structure. DMTSA denotes 2,3-dimethyltetraseleno-anthracene. The NO3 salt is semiconducting below room temperature, and the BF4 salt is metallic above 220 K and semiconducting at lower temperatures. We found that their magnetic susceptibility is paramagnetic and independent of temperature from 300 K down to 10 K in common. The obtained magnetic property can not be attributed to conduction electrons but discussed in terms of Mott insulating state. Furthermore, high pressure experiment reveals that the NO3 salt is not semiconducting but rather semi-metallic, and more that the BF4 salt shows a small conductive anomaly around 70 K and maintains metallic at low temperatures under the pressure of 0.5 GPa.

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