Superconductivity of β-type salts under uniaxial compression

Hiroshi Ito; Tetsuo Ishihara; Masafumi Niwa; Takeo Suzuki; Seiichiro Onari; Yukio Tanaka; Jun Ichi Yamada; Hideki Yamochi; Gunzi Saito

doi:10.1016/j.physb.2009.12.073

Superconductivity of β-type salts under uniaxial compression

Hiroshi Ito, Tetsuo Ishihara, Masafumi Niwa, Takeo Suzuki, Seiichiro Onari, Yukio Tanaka, Jun Ichi Yamada, Hideki Yamochi, Gunzi Saito

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

We studied the superconducting transition temperature T_C of β-(BEDT-TTF)₂I₃ in the high-T_C phase under uniaxial strain. By embedding the crystal into epoxy resin, 8 K superconducting phase is stabilized. By applying uniaxial compression, further T_C increase taking a maximum at a piston pressure of 3-4 kbar is observed for both directions parallel and perpendicular to the donor stack. The behavior is understood as a competition between the electron correlation (U _dimer/W) and spin frustration (t'/t) in terms of the spin-fluctuation mediated superconductivity on the dimerized triangular lattice Hubbard model.

Original language	English
Pages (from-to)	S262-S264
Journal	Physica B: Condensed Matter
Volume	405
Issue number	11 SUPPL.
DOIs	https://doi.org/10.1016/j.physb.2009.12.073
Publication status	Published - Jun 1 2010

Keywords

Dimerization
Spin frustration
Superconductivity
Uniaxial strain
β-type BEDT-TTF salt

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Cite this

Ito, H., Ishihara, T., Niwa, M., Suzuki, T., Onari, S., Tanaka, Y., Yamada, J. I., Yamochi, H., & Saito, G. (2010). Superconductivity of β-type salts under uniaxial compression. Physica B: Condensed Matter, 405(11 SUPPL.), S262-S264. https://doi.org/10.1016/j.physb.2009.12.073

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title = "Superconductivity of β-type salts under uniaxial compression",

abstract = "We studied the superconducting transition temperature TC of β-(BEDT-TTF)2I3 in the high-TC phase under uniaxial strain. By embedding the crystal into epoxy resin, 8 K superconducting phase is stabilized. By applying uniaxial compression, further TC increase taking a maximum at a piston pressure of 3-4 kbar is observed for both directions parallel and perpendicular to the donor stack. The behavior is understood as a competition between the electron correlation (U dimer/W) and spin frustration (t'/t) in terms of the spin-fluctuation mediated superconductivity on the dimerized triangular lattice Hubbard model.",

keywords = "Dimerization, Spin frustration, Superconductivity, Uniaxial strain, β-type BEDT-TTF salt",

author = "Hiroshi Ito and Tetsuo Ishihara and Masafumi Niwa and Takeo Suzuki and Seiichiro Onari and Yukio Tanaka and Yamada, {Jun Ichi} and Hideki Yamochi and Gunzi Saito",

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AU - Ito, Hiroshi

AU - Ishihara, Tetsuo

AU - Niwa, Masafumi

AU - Suzuki, Takeo

AU - Onari, Seiichiro

AU - Tanaka, Yukio

AU - Yamada, Jun Ichi

AU - Yamochi, Hideki

AU - Saito, Gunzi

PY - 2010/6/1

Y1 - 2010/6/1

N2 - We studied the superconducting transition temperature TC of β-(BEDT-TTF)2I3 in the high-TC phase under uniaxial strain. By embedding the crystal into epoxy resin, 8 K superconducting phase is stabilized. By applying uniaxial compression, further TC increase taking a maximum at a piston pressure of 3-4 kbar is observed for both directions parallel and perpendicular to the donor stack. The behavior is understood as a competition between the electron correlation (U dimer/W) and spin frustration (t'/t) in terms of the spin-fluctuation mediated superconductivity on the dimerized triangular lattice Hubbard model.

AB - We studied the superconducting transition temperature TC of β-(BEDT-TTF)2I3 in the high-TC phase under uniaxial strain. By embedding the crystal into epoxy resin, 8 K superconducting phase is stabilized. By applying uniaxial compression, further TC increase taking a maximum at a piston pressure of 3-4 kbar is observed for both directions parallel and perpendicular to the donor stack. The behavior is understood as a competition between the electron correlation (U dimer/W) and spin frustration (t'/t) in terms of the spin-fluctuation mediated superconductivity on the dimerized triangular lattice Hubbard model.

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KW - Spin frustration

KW - Superconductivity

KW - Uniaxial strain

KW - β-type BEDT-TTF salt

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