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- W4323922922 abstract "Motivated by the discovery of superconductivity in the infinite-layer nickelate family, we report an experimental endeavor to clean the surface of nickelate superconductor Pr0.8Sr0.2NiO2 films by Ar+ ion sputtering and subsequent annealing, and we study their electronic structures by cryogenic scanning tunneling microscopy and spectroscopy. The annealed surfaces are characterized by nano-sized clusters and Coulomb staircases with periodicity inversely proportional to the projected area of the nanoclusters, consistent with a double-barrier tunneling junction model. Moreover, the dynamical Coulomb blockade effects are observed and result in well-defined energy gaps around the Fermi level, which correlate closely with the specific configuration of the junctions. These Coulomb blockade-related phenomena provide an alternative plausible cause of the observed gap structure that should be considered in the spectroscopic understanding of nickelate superconductors with the nano-clustered surface." @default.
- W4323922922 created "2023-03-12" @default.
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- W4323922922 date "2023-03-09" @default.
- W4323922922 modified "2023-10-14" @default.
- W4323922922 title "Observation of Coulomb blockade and Coulomb staircases in superconducting Pr0.8Sr0.2NiO2 films" @default.
- W4323922922 doi "https://doi.org/10.48550/arxiv.2303.05094" @default.
- W4323922922 hasPublicationYear "2023" @default.
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