Anisotropic superconductivity in bulk Ca C6

E. Jobiliong; H. D. Zhou; J. A. Janik; Y. J. Jo; L. Balicas; J. S. Brooks; C. R. Wiebe

doi:10.1103/PhysRevB.76.052511

Anisotropic superconductivity in bulk Ca C6

E. Jobiliong, H. D. Zhou, J. A. Janik, Y. J. Jo, L. Balicas, J. S. Brooks, C. R. Wiebe

Florida State University

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23 Scopus citations

Abstract

The intercalated graphite superconductor Ca C6 with Tc ∼11.5 K has been characterized with angular dependent magnetoresistance measurements. Above Tc, the interplane resistivity can be fitted to the Bloch-Grüneisen model providing a Debye temperature of θD =175 K. From these parameters, the McMillan formula yields an electron-phonon coupling constant λ∼1.1, placing this material in the intermediate-to-strong coupling regime. For 1.4 K<T< Tc, the upper critical field Bc2 is found to be anisotropic and linear in temperature.

Original language	English
Article number	052511
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	76
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.76.052511
State	Published - 30 Aug 2007

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10.1103/PhysRevB.76.052511

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abstract = "The intercalated graphite superconductor Ca C6 with Tc ∼11.5 K has been characterized with angular dependent magnetoresistance measurements. Above Tc, the interplane resistivity can be fitted to the Bloch-Gr{\"u}neisen model providing a Debye temperature of θD =175 K. From these parameters, the McMillan formula yields an electron-phonon coupling constant λ∼1.1, placing this material in the intermediate-to-strong coupling regime. For 1.4 K",

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AU - Janik, J. A.

AU - Jo, Y. J.

AU - Balicas, L.

AU - Brooks, J. S.

AU - Wiebe, C. R.

PY - 2007/8/30

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N2 - The intercalated graphite superconductor Ca C6 with Tc ∼11.5 K has been characterized with angular dependent magnetoresistance measurements. Above Tc, the interplane resistivity can be fitted to the Bloch-Grüneisen model providing a Debye temperature of θD =175 K. From these parameters, the McMillan formula yields an electron-phonon coupling constant λ∼1.1, placing this material in the intermediate-to-strong coupling regime. For 1.4 K

AB - The intercalated graphite superconductor Ca C6 with Tc ∼11.5 K has been characterized with angular dependent magnetoresistance measurements. Above Tc, the interplane resistivity can be fitted to the Bloch-Grüneisen model providing a Debye temperature of θD =175 K. From these parameters, the McMillan formula yields an electron-phonon coupling constant λ∼1.1, placing this material in the intermediate-to-strong coupling regime. For 1.4 K

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Anisotropic superconductivity in bulk Ca C6

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