Magnetic and optical properties of an ambient-pressure organic superconductor (BEDT-TTF)2[Cu(NCS)2]

Sugano, Tadashi; Nozawa, K.; Hayashi, H.; Nishikida, Koichi; Terui, Kenji; Fukasawa, Tomonori; Takenouchi, Hiroshi; Mino, Shinji; Urayama, H.; Yamochi, Hideki; Saito, Gunzi; Kinoshita, Minoru

doi:10.1016/0379-6779(88)90419-5

Cited by 16 publications

(1 citation statement)

References 8 publications

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“…At all pressures two BEDT-TTF molecules contribute exactly one hole to the conductivity and the only change in the carrier density is due to the decreasing unit cell volume under pressure. Thus, n(P ) = n 0 × V 0 /V (P ), with n 0 = 1.2 × 10 27 m −3 [19,27], and V (P ) = V 0 × (1 − 0.065 × P (GPa)) [28]. Note that m opt determined this way contains contributions from the Drude term as well as from the broad mid-IR hump and is thus expected to be an underestimate of the Drude mass.…”

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confidence: 99%

Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure

Klehe

McDonald

Goncharov

et al. 2000

J. Phys.: Condens. Matter

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The organic superconductor -(BEDT-TTF)2 Cu(SCN)2 has been investigated at room temperature by polarized mid-infrared (600-7000 cm-1 ) reflectivity measurements at pressures of up to 1.7 GPa. The optical effective mass, m opt , decreases linearly with pressure, in contrast to the pressure dependence of the effective mass, m * , determined by magnetic quantum oscillation measurements (Caulfield J et al 1994 J. Phys.: Condens. Matter 6 2911-24; Caulfield J et al 1995 Synth. Met. 70 815-8). Most phonon modes are seen to exhibit a linear pressure dependence of 0.5-1% / GPa. The stronger pressure dependence of the central C = C mode of the BEDT-TTF molecule is discussed: it is thought to be due to the pressure dependence of the effective Coulomb repulsion in -(BEDT-TTF)2 Cu(SCN)2 . These measurements suggest that a change in the electron-electron interaction under pressure could be the relevant factor for the suppression of superconductivity under pressure in -(BEDT-TTF)2 Cu(SCN)2 .

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confidence: 99%

Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure

Klehe

McDonald

Goncharov

et al. 2000

J. Phys.: Condens. Matter

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Frontiers of Organic Superconductors

Saito

1990

Lower-Dimensional Systems and Molecular Electronics

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Nuclear Spin-Lattice Relaxation in the Organic Superconductor (BEDT-TTF)2Cu(NCS)2: Measurements by the Field Cycling Technique

Takahashi¹,

Kanoda²,

Sakao³

et al. 1990

Springer Proceedings in Physics

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Magnetic and optical properties of an ambient-pressure organic superconductor (BEDT-TTF)2[Cu(NCS)2]

Cited by 16 publications

References 8 publications

Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure

Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure

Frontiers of Organic Superconductors

Nuclear Spin-Lattice Relaxation in the Organic Superconductor (BEDT-TTF)2Cu(NCS)2: Measurements by the Field Cycling Technique

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Magnetic and optical properties of an ambient-pressure organic superconductor (BEDT-TTF)2[Cu(NCS)2]

Cited by 16 publications

References 8 publications

Infrared studies of the organic superconductor kappa-(BEDT-TTF)2Cu(SCN)2under pressure

Infrared studies of the organic superconductor kappa-(BEDT-TTF)2Cu(SCN)2under pressure

Frontiers of Organic Superconductors

Nuclear Spin-Lattice Relaxation in the Organic Superconductor (BEDT-TTF)2Cu(NCS)2: Measurements by the Field Cycling Technique

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Resources

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Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure

Infrared studies of the organic superconductor kappa-(BEDT-TTF)₂Cu(SCN)₂under pressure