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Showing 1–5 of 5 results
Advanced filters: Author: Jessica L. McChesney Clear advanced filters

  • Rare earth Nickelates, (RENiO3) host a bond disproportionation phase transition where oxygen 2p holes form at one of the Ni sites. This process results in a spin-disproportionation state where a singlet state is formed by the spin of the nickel and the spin of the oxygen hole at every other site. Here, Li et al find evidence of this spin-disproportionated state in a rareearth nickelate.

    • Jiarui Li
    • Robert J. Green
    • Riccardo Comin
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-6

  • Angle-resolved photoemission spectroscopy of CaNi2 shows a band with vanishing dispersion across the full 3D Brillouin zone that is identified with the pyrochlore flat band as well as two additional flat bands that arise from multi-orbital interference of Ni d-electrons.

    • Joshua P. Wakefield
    • Mingu Kang
    • Joseph G. Checkelsky
    Research
    Nature
    Volume: 623, P: 301-306

  • Thermal annealing of SiC produces graphene layers on an insulating substrate, but the material is highly inhomogeneous. It is now shown that an argon atmosphere during annealing improves uniformity of the graphene layers dramatically and yields better transport characteristics. This is a very important result for the development of graphene-based electronic devices.

    • Konstantin V. Emtsev
    • Aaron Bostwick
    • Thomas Seyller
    Research
    Nature Materials
    Volume: 8, P: 203-207

  • The recent discovery of superconductivity in the nickelates provides another angle to investigate this phenomenon in the high-Tc cuprates and hopefully help solve the mechanism of their unconventional superconductivity. Here, the authors report an increase in Tc for Pr0.8Sr0.2NiO2 where strain from the underlying LSAT substrate plays a possible role, supporting simulations also reveal the contributing role Ni and O orbitals hybridisation play in the unconventional pairing.

    • Xiaolin Ren
    • Jiarui Li
    • Zhihai Zhu
    ResearchOpen Access
    Communications Physics
    Volume: 6, P: 1-8