Penetration of Andreev bound states into the ferromagnet in a SrRuO${}_3$/(110)YBa${}_2$Cu${}_3$O${}_{7-\delta }$ bilayer: a scanning tunneling spectroscopy study

Abstract

Scanning tunneling spectroscopy of thin epitaxial $SrRu{O}_3/(110)YB{a}_{2}C{u}_3{O}_{7-\delta }$ ferromagnet/superconductor bilayers, reveal a clear penetration of the Andreev bound states into the ferromagnetic layer. The penetration is manifested in the density of states of the ferromagnet as a split zero bias conductance peak with an imbalance between peak heights. Our data indicate that the splitting occurs at the superconductor side as a consequence of induced magnetization, confirming recent theoretical predictions. The imbalance is attributed to the spin polarization in the ferromagnet.

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References in corpus (3)

• Oscillations of Induced Magnetization in Superconductor-Ferromagnet Heterostructures
• Evidence for Crossed Andreev Reflections in bilayers of (100)YBCO and the itinerant ferromagnet SrRuO3
• Proximity effect in ferromagnet-superconductor hybrid structures: role of the pairing symmetry

Cited by in corpus (2)

• Scanning tunneling spectroscopy of SmFeAsO0.85: Possible evidence for d-wave order parameter symmetry
• Proximity effect and its enhancement by ferromagnetism in high-temperature superconductor-ferromagnet structures