Regensburg 2007 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Superconductivity - Poster Session
TT 8.23: Poster
Montag, 26. März 2007, 14:00–17:45, Poster A
Strong anisotropic superconducting behavior in the dichalcogenide SnSe2 intercalated with cobaltocene — •Robert Miller1, Sandra Altmannshofer1, Ernst-Wilhelm Scheidt1, Rudolf Herrmann1, Franz Mayr2, Dietrich Einzel3, and Wolfgang Scherer1 — 1CPM, Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany — 2EP V – EKM, Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany — 3Walther-Meissner-Institut für Tieftemperaturforschung, 85748 Garching, Germany
We present a detailed study of the layered dichalcogenide SnSe2 intercalated with the organometallic donor molecule cobaltocene, which exhibits a superconducting transition at Tc = 6 K. The extremely anisotropic superconducting behavior is reflected by an in-plane and off-plane resistivity, which deviate from each other by a factor of 200 just before superconductivity sets in. Furthermore, this strong anisotropy leads to two different superconducting transition temperatures, one goes in line with the in-plane and the other with the off-plane superconductivity . In addition, specific heat studies clearly characterize the intercalated SnSe2 as a bulk superconductor with these two different Tc’s.