Publications in Scientific Journals:

E. Scheidt, F. Mayr, G. Eickerling, P. Rogl, E. Bauer:
"Double Specific Heat Anomaly of the Superconducting State of CePt3Si";
Journal of Physics: Condensed Matter, 17 (2005), L121 - L124.

English abstract:
Double specific heat anomaly of the superconducting state of CePt3Si

E-W Scheidt1, F Mayr1, G Eickerling1, P Rogl2 and E Bauer3
1 Chemische Physik und Materialwissenschaften, Universität Augsburg, 86159 Augsburg, Germany
2 Institut für Physikalische Chemie, Universität Wien, 1090 Wien, Austria
3 Institut für Festkörperphysik, TU Wien, 1040 Wien, Austria

E-mail: Ernst-Wilhelm.Scheidt@physik.uni-augsburg.de

Received 22 February 2005
Published 11 March 2005
Print publication: Issue 12 (30 March 2005)

Abstract. CePt3Si is the first heavy fermion superconductor without a centre of symmetry. Below an antiferromagnetic transition at 2.25 K superconductivity occurs at TC = 0.73 K. The non-centrosymmetric structure is expected to have significant impact on the nature of the superconducting order parameter. This may be a reason for the unusual shape of the superconducting transition observed in the specific heat. We present specific heat data which clearly show the existence of a double anomaly in the superconducting state, signalling two consecutive phase transitions, as in the uranium based heavy fermion superconductors U1-xThxBe13 and UPt3.

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