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Fully Suppressed Superconductivity in Nonferromagnetic Heavy Fermion/Superconductor Bilayers: Rocksalt-Type CeO/LaO
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DOI：10.1021/acsnano.6c00792.png)
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Abstract
En 中文
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.
Keywords:
Epitaxy
Layers
Magnetic properties
Thin films
Vesicles
superconductivity
heavy-fermion system
pair-breaking proximity effect
interface
heteroepitaxial bilayer
rare-earth monoxide
rocksalt-type structure
Journal
IF:
16
Papers:
2.6W
Citations:
25.6W
Organization
Cited Papers