Penetration of Andreev bound states into the ferromagnet in a SrRuO3∕(110)YBa2Cu3O7−δ bilayer: A scanning tunneling spectroscopy study
Itay Asulin, Ofer Yuli, Israel Felner, Gad Koren, Oded Millo
DOI 10.1103/PhysRevB.76.064507 · Physical Review B
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Abstract
Scanning tunneling spectroscopy of thin epitaxial SrRuO3∕(110)YBa2Cu3O7−δ ferromagnet/superconductor bilayers reveals 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.
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 |
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