Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 73: Superconductivity: Tunneling and Josephson Junctions
TT 73.9: Talk
Thursday, March 12, 2026, 11:45–12:00, CHE/0089
Signatures of triplet pairing in FSF hybrid junctions — •Andreas Costa1, Pablo Tuero2, Cesar Gonzalez-Ruano2,3, Yuan Lu4, Farkhad G. Aliev2, and Jaroslav Fabian1 — 1University of Regensburg, Germany — 2Universidad Autónoma de Madrid, Spain — 3Universidad Pontificia Comillas, Spain — 4Université de Lorraine, France
Interfaces between ferromagnets and conventional s-wave superconductors serve as prototype systems to explore the conversion of singlet into spin-polarized triplet Cooper pairs in superconducting spintronics.
Recent experimental studies found anomalous quasiparticle conductance modulations in ferromagnet/superconductor/ferromagnet (FSF) hybrids under a rotated in-plane magnetic field. In this talk, we will report on our theoretical conductance simulations performed to unravel the physical origin of these anomalies. We will demonstrate that the experimental data show strong signatures of nonuniform magnetization and complex interfacial spin-orbit fields present in these junctions. As both are expected to induce spin-triplet Cooper pairs by rotating the spin quantization axis, we propose the observed conductance anomalies to provide a possible experimental fingerprint of unconventional triplet superconductivity.
The theory part of this work has been supported by Deutsche Forschungsgemeinschaft (DFG; German Research Foundation)—454646522; 314695032.
Keywords: ferromagnet/superconductor hybrids; triplet superconductivity; spin-orbit coupling; nonuniform magnetization