Point Contact Study of the Superconducting Order Parameter in RuSr2GdCu2O8
Samanta Piano, Fabrizio Bobba, Filippo Giubileo, Anna Maria Cucolo, Antonio Vecchione
Abstract
We have performed a detailed study of the conductance characteristics obtained by point contact junctions realized between a normal Pt/Ir tip and syntered RuSr2GdCu2O8 (Ru-1212) samples. Indeed, this compound is subject of great interest due to the coexistence of both magnetic order and bulk superconductivity. In our experiments, the low temperature tunneling spectra reproducibly show a zero bias conductance peak that can be well reproduced by a generalized BTK model in the case of d-wave symmetry of the superconducting order parameter.
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