Authors
Mikito Sekine, Masamichi Negishi, Satoshi Sasaki, Hidetatsu Yoshimura, Noriaki Kimura, Tomoteru Fukumura
Published in
ACS nano. Jul 09, 2026. Epub Jul 09, 2026.
Abstract
Superconductor/ferromagnet heterostructures have been investigated extensively because of their capability to break superconducting electron pairs. In this study, we report on heterostructures of a superconductor and heavy-fermion system as an alternative platform for a strong pair-breaking proximity effect. We fabricated rocksalt-type CeO/LaO heteroepitaxial bilayers, where LaO is a superconductor and CeO is a nonferromagnetic heavy-fermion system. While LaO(9.5-21 nm) thin films showed superconductivity below 4.4-5.2 K, the CeO(4.8-5.8 nm)/LaO(9.2-17 nm) bilayers showed no trace of superconductivity down to 0.025 K. This result demonstrates a strong pair-breaking effect at the superconductor/heavy-fermion system heteroepitaxial interface. This effect would provide a useful platform for superconducting micro and nano devices.
PMID:
42424622
Bibliographic data and abstract were imported from PubMed on 10 Jul 2026.
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