Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3

J. Hagel; O. Ignatchik; J. Wosnitza; C. Pfleiderer; J. A. Schlueter; H. Davis; R. Winter; G. L. Gard

doi:10.1016/j.physc.2007.04.163

Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)₂SF₅CH₂CF₂SO₃

J. Hagel, O. Ignatchik, J. Wosnitza, C. Pfleiderer, J. A. Schlueter, H. Davis, R. Winter, G. L. Gard

Chair of Experimental Physics on the Topology of Correlated Systems

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Abstract

We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor β″-(ET)₂SF₅CH₂CF₂SO₃. With increasing pressure both the superconducting transition temperature, T_c, as well as the effective mass, m_c, decrease monotonously. By assuming a direct relationship between m_c and the superconducting coupling parameter λ, the pressure dependence of T_c can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows ρ = ρ₀ + AT² at low temperatures. The coefficient A, however, is found to be not proportional to m_c² as expected for a purely electronic origin of the T² behavior.

Original language	English
Pages (from-to)	639-640
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.04.163
State	Published - 1 Sep 2007

Keywords

Electronic-transport properties
Organic superconductors
Shubnikov-de Haas effect

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Hagel, J., Ignatchik, O., Wosnitza, J., Pfleiderer, C., Schlueter, J. A., Davis, H., Winter, R., & Gard, G. L. (2007). Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)₂SF₅CH₂CF₂SO₃. Physica C: Superconductivity and its Applications, 460-462 I(SPEC. ISS.), 639-640. https://doi.org/10.1016/j.physc.2007.04.163

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title = "Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3",

abstract = "We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3. With increasing pressure both the superconducting transition temperature, Tc, as well as the effective mass, mc, decrease monotonously. By assuming a direct relationship between mc and the superconducting coupling parameter λ, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows ρ = ρ0 + AT2 at low temperatures. The coefficient A, however, is found to be not proportional to mc2 as expected for a purely electronic origin of the T2 behavior.",

keywords = "Electronic-transport properties, Organic superconductors, Shubnikov-de Haas effect",

author = "J. Hagel and O. Ignatchik and J. Wosnitza and C. Pfleiderer and Schlueter, {J. A.} and H. Davis and R. Winter and Gard, {G. L.}",

note = "Funding Information: Financial support by the Deutsche Forschungsgemeinschaft is gratefully acknowledged. Work at Argonne National Laboratory was supported by the US Department of Energy (Grant No. W-31-109-ENG-38). Work at Portland State University was supported by NSF (Grant No. Che-9904316).",

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doi = "10.1016/j.physc.2007.04.163",

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Hagel, J, Ignatchik, O, Wosnitza, J, Pfleiderer, C, Schlueter, JA, Davis, H, Winter, R & Gard, GL 2007, 'Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)₂SF₅CH₂CF₂SO₃', Physica C: Superconductivity and its Applications, vol. 460-462 I, no. SPEC. ISS., pp. 639-640. https://doi.org/10.1016/j.physc.2007.04.163

TY - JOUR

T1 - Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3

AU - Hagel, J.

AU - Ignatchik, O.

AU - Wosnitza, J.

AU - Pfleiderer, C.

AU - Schlueter, J. A.

AU - Davis, H.

AU - Winter, R.

AU - Gard, G. L.

N1 - Funding Information: Financial support by the Deutsche Forschungsgemeinschaft is gratefully acknowledged. Work at Argonne National Laboratory was supported by the US Department of Energy (Grant No. W-31-109-ENG-38). Work at Portland State University was supported by NSF (Grant No. Che-9904316).

PY - 2007/9/1

Y1 - 2007/9/1

N2 - We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3. With increasing pressure both the superconducting transition temperature, Tc, as well as the effective mass, mc, decrease monotonously. By assuming a direct relationship between mc and the superconducting coupling parameter λ, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows ρ = ρ0 + AT2 at low temperatures. The coefficient A, however, is found to be not proportional to mc2 as expected for a purely electronic origin of the T2 behavior.

AB - We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor β″-(ET)2SF5CH2CF2SO3. With increasing pressure both the superconducting transition temperature, Tc, as well as the effective mass, mc, decrease monotonously. By assuming a direct relationship between mc and the superconducting coupling parameter λ, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows ρ = ρ0 + AT2 at low temperatures. The coefficient A, however, is found to be not proportional to mc2 as expected for a purely electronic origin of the T2 behavior.

KW - Electronic-transport properties

KW - Organic superconductors

KW - Shubnikov-de Haas effect

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JO - Physica C: Superconductivity and its Applications

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IS - SPEC. ISS.

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Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor β″-(ET)₂SF₅CH₂CF₂SO₃

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