Magnetic field dependence of the proximity-induced triplet superconductivity at ferromagnet/superconductor interfaces

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2014
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Kalcheim, Yoav
Felner, Israel
Millo, Oded
Kirzhner, Tal
Koren, Gad
Egilmez, Mehmet
Blamire, Mark G.
Robinson, Jason W. A.
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https://doi.org/10.1103/PhysRevB.89.180506
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Physical Review B. 2014, 89(18), 180506(R). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.180506
Zusammenfassung

Long-ranged superconductor proximity effects recently found in superconductor-ferromagnetic (S-F) systems are generally attributed to the formation of triplet-pairing correlations due to various forms of magnetic inhomogeneities at the S-F interface. In order to investigate this conjecture within a single F layer coupled to a superconductor, we performed scanning tunneling spectroscopy on bilayers of La2/3Ca1/3MnO3 (LCMO) ferromagnetic thin films grown on high-temperature superconducting films of YBa2Cu3O7−δ or Pr1.85Ce0.15CuO4 under various magnetic fields. We find a strong correlation between the magnitude of superconductor-related spectral features measured on the LCMO layer and the degree of magnetic inhomogeneity controlled by the external magnetic field. This corroborates theoretical predictions regarding the role played by magnetic inhomogeneities in inducing triplet pairing at S-F interfaces.

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ISO 690KALCHEIM, Yoav, Israel FELNER, Oded MILLO, Tal KIRZHNER, Gad KOREN, Angelo DI BERNARDO, Mehmet EGILMEZ, Mark G. BLAMIRE, Jason W. A. ROBINSON, 2014. Magnetic field dependence of the proximity-induced triplet superconductivity at ferromagnet/superconductor interfaces. In: Physical Review B. 2014, 89(18), 180506(R). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.180506
BibTex
@article{Kalcheim2014-05-21Magne-47148,
  year={2014},
  doi={10.1103/PhysRevB.89.180506},
  title={Magnetic field dependence of the proximity-induced triplet superconductivity at ferromagnet/superconductor interfaces},
  number={18},
  volume={89},
  issn={1098-0121},
  journal={Physical Review B},
  author={Kalcheim, Yoav and Felner, Israel and Millo, Oded and Kirzhner, Tal and Koren, Gad and Di Bernardo, Angelo and Egilmez, Mehmet and Blamire, Mark G. and Robinson, Jason W. A.},
  note={Article Number: 180506(R)}
}
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