Superconducting-like behavior of Bi/Bi2O3 interface

Superconducting-like behavior of Bi/Bi2O3 interface

•Bi/Bi2O3 interface was formed by surface oxidation of Bi.•Magnetic susceptibility and electrical resistance of the interface were studied.•Superconductivity at 15–35 K of the Bi/Bi2O3 interfaces was observed.•The superconducting interface is instable under normal conditions. Metastable superconduct...

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Veröffentlicht in:Physica. C, Superconductivity Superconductivity, 2020-04, Vol.571, p.1353608, Article 1353608
Hauptverfasser: Palnichenko, A.V., Mazilkin, A.A., Rybchenko, O.G., Shakhrai, D.V., Vyaselev, O.M.
Format: Artikel
Sprache:eng
Schlagworte:
Bi/Bi2O3 interface
Bismuth oxides
Bismuth trioxide
Dynamic magnetic susceptibility
Electric resistance
Electrical resistance
Electron microscopy
Interfacial bonding
Interfacial superconductivity
Magnetic permeability
Oxidation
Superconductivity
Temperature
X-ray diffraction
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Zusammenfassung:•Bi/Bi2O3 interface was formed by surface oxidation of Bi.•Magnetic susceptibility and electrical resistance of the interface were studied.•Superconductivity at 15–35 K of the Bi/Bi2O3 interfaces was observed.•The superconducting interface is instable under normal conditions. Metastable superconducting-like behavior of rhombohedral Bi samples exposed to surface oxidation under special conditions has been observed below the critical temperature range of 15–35 K. The ac magnetic susceptibility and electrical resistance measurements imply that the superconductivity appears in the Bi/Bi2O3 interfacial layer formed at the surface of the samples.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2020.1353608