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Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 50: SC: Tunneling, Josephson Junctions, SQUIDs 2

TT 50.1: Talk

Thursday, March 17, 2011, 14:00–14:15, HSZ 301

Probing the superconducting state of CeCoIn5 by quantum interferometry — •Oleksandr Foyevtsov, Fabrizio Porrati, and Michael Huth — Johann Wolfgang Goethe University, Frankfurt am Main, Germany

Josephson junction based structures provide a pathway to investigation of the superconducting state of unconventional superconductors. A superconducting quantum interference device (SQUID) structure was fabricated on micro-crystals of the heavy-fermion superconductor CeCoIn5. Photo-lithography and ion beam milling/induced deposition were used to prepare the structure on a thin film of CeCoIn5 grown via molecular beam epitaxy. The interferometer was characterized with regard to the SQUID properties. The unconventional nature of superconducting state in CeCoIn5, the implications of the normal-state electronic properties, as well as the weak-link characteristics of the SQUID structure itself lead to a wealth of different features in the I(V) and dI/dV(V) characteristics.

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