Dresden 2006 – scientific programme

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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.73: Poster

Wednesday, March 29, 2006, 14:30–18:30, P1

Growth of heavy-fermion superconductor CeCoIn₅ thin films — •Oleksiy K. Soroka, Gabriele Blendin, and Michael Huth — Physikalisches Institut, Max-von-Laue-Str. 1, D-60438, Frankfurt am Main

Heavy-fermion superconductors develop superconductivity out of a normal state in which electronic correlations cause a large increase of the conduction electrons’ effective mass. The superconductive state is strongly affected by the magnetic excitations in these materials and is insofar unconventional. The most direct technique to investigate the spectrum of these excitations is tunneling spectroscopy which benefits strongly from well-defined surface as presented by epitaxial thin films. CeCoIn₅ is a member of the heavy-fermion family with the general formula CeMIn₅ (M=Co, Ir, Rh). It has the highest transition temperature of all heavy-fermion superconductors discovered up to date and is close to a quantum critical point. Thin films of CeCoIn₅ were deposited on different substrates by using molecular beam epitaxy. The growth characteristics were studied by means of x-ray diffraction. The chemical composition of the films was examined by energy dispersive x-ray analysis.