Volume 77, Number 2, January 2007
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 January 2007|
Mixed order parameter symmetries in cuprate superconductors
Max-Planck-Institut für Festkörperforschung - Heisenbergstrasse 1, D-70569 Stuttgart, Germany
2 Physik Institut der Universität Zürich - Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
3 Physics Institute of Tbilisi State University - Chavchadze 3, GE-0128 Tbilisi, Georgia
Accepted: 16 November 2006
The recent observation of an inflection point in the temperature dependence of the in-plane magnetic field dependence is investigated within a two-band model with coupled order parameters of different symmetries. While the dominant order parameter has d-wave symmetry, the smaller one is of s-wave symmetry. Superconductivity is robust in the d-wave channel and induced via interband interactions in the s-wave subsystem.
PACS: 74.20.-z – Theories and models of superconducting state / 74.72.-h – Cuprate superconductors (high-Tc and insulating parent compounds) / 74.20.Rp – Pairing symmetries (other than s-wave)
© Europhysics Letters Association, 2007
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