Specific heat of aluminium-doped superconducting silicon carbide

Details Specific heat of aluminium-doped superconducting silicon carbide Specific heat of aluminium-doped superconducting silicon carbide

2009-05-30

arxiv.org/abs/0906.0069v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

The discoveries of superconductivity in heavily boron-doped diamond, silicon and silicon carbide renewed the interest in the ground states of charge-carrier doped wide-gap semiconductors. Recently, aluminium doping in silicon carbide successfully yielded a metallic phase from which at high aluminium concentrations superconductivity emerges. Here, we present a specific-heat study on superconducting aluminium-doped silicon carbide. We observe a clear jump anomaly at the superconducting transition temperature 1.5 K indicating that aluminium-doped silicon carbide is a bulk superconductor. An analysis of the jump anomaly suggests BCS-like phonon-mediated superconductivity in this system.

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