Evidence for crossed Andreev reflections in bilayers of (100) YBa2Cu3O7−δ and the itinerant ferromagnet SrRuO3

Itay Asulin; Ofer Yuli; Gad Koren; Oded Millo

doi:10.1103/PhysRevB.74.092501

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Evidence for crossed Andreev reflections in bilayers of (100) YBa2Cu3O7−δ and the itinerant ferromagnet SrRuO3

Itay Asulin, Ofer Yuli, Gad Koren, Oded Millo

DOI 10.1103/PhysRevB.74.092501 · Physical Review B

T1

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Abstract

Scanning tunneling spectroscopy measurements on thin epitaxial SrRuO3∕(100)YBa2Cu3O7−δ ferromagnet/superconductor bilayers, reveal localized regions in which the superconductor order parameter penetrates the ferromagnet to more than 26nm, an order of magnitude larger than the coherence length in the ferromagnetic layer. These regions consist of narrow (<10nm) and long strips, separated by at least 200nm, consistent with the known magnetic domain wall structure in SrRuO3. This behavior may be due to crossed Andreev reflections, taking place in the vicinity of the magnetic domain walls.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	88	Pressure not reported	onset
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	78	Pressure not reported	zero_resistance