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Possible spin-triplet superconducting phase in the La0.7Sr0.3MnO3/YBa2Cu3O7/ La0.7Sr0.3MnO3 trilayers

Piotr PRZYSLUPSKI, Institut de Physique de l’Académie des Sciences de Pologne 36-42 Aleja Lotnikow, Varsovie, Pologne

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The result of the transport and magnetic properties of the LSMO/YBCO/LSMO trilayer structures will be presented. An enhancement of the superconducting transition temperature was observed in magnetic field lower than the saturation field. Possible mechanism of such enhancement was discussed.
The measurements of differential conductivity in the current in-plane geometry demonstrate a sharp peak similar as was observed in the p-wave Sr2RuO4 superconductor.
Measurements in the current perpendicular to plane geometry demonstrate a “V” shape typical for the superconductor with d-wave symmetry.
The relevance of the experimental results to recent theoretical models for unconventional contacts will be discussed.


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