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Showing 1–11 of 11 results
Advanced filters: Author: Marta Gibert 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

  • Oxide materials can be combined to create heterostructures exhibiting complex properties not found in either substance individually. Here, the authors observe antiferromagnetic interlayer exchange coupling between ferromagnetic lanthanum manganite and nominally paramagnetic lanthanum nickel oxide.

    • M. Gibert
    • M. Viret
    • J.-M. Triscone
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7

  • Interfaces between insulating oxides have revealed exotic electronic and magnetic properties. It is now shown that a complex magnetic structure can emerge in an oxide superlattice, and that specific interfaces can unexpectedly exhibit exchange bias. The observations reveal the induction of antiferromagnetism in a material that is usually paramagnetic.

    • Marta Gibert
    • Pavlo Zubko
    • Jean-Marc Triscone
    Research
    Nature Materials
    Volume: 11, P: 195-198

  • Strongly correlated materials can exhibit deviations from Fermi-liquid behavior partly due to anomalies in the density of states at the Fermi level, such as van Hove singularities. Here, the authors investigate the unusual Fermi liquid behavior of calcium-doped strontium ruthenate and find an unusual variation of the Kadowaki-Woods ratio which may originate from disorder.

    • Yang Xu
    • František Herman
    • Johan Chang
    ResearchOpen Access
    Communications Physics
    Volume: 4, P: 1-6

  • Rare-earth perovskite nickelates show intriguing metal–insulator transitions, whose mechanism remains elusive. Here, Bisogni et al. evidenced a 3d8 Ni configuration together with abundance of oxygen 2p holes in the ground state of a NdNiO3thin film, suggesting a negative charge-transfer scenario.

    • Valentina Bisogni
    • Sara Catalano
    • Thorsten Schmitt
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-8

  • The many strongly interacting degrees of freedom in transition metal oxides make it difficult to capture and describe the nature of their metal-insulator transitions. Li et al. show that a resonant magnetic X-ray nanoprobe gives access to local critical behavior that is difficult to detect otherwise.

    • Jiarui Li
    • Jonathan Pelliciari
    • Riccardo Comin
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • Yero et al. elucidate the function of Ttg2D, a Pseudomonas aeruginosa periplasmic protein, in maintaining phospholipid asymmetry between the outer and inner membrane. Gram negative bacteria have inner and outer membranes that differ in phospholipd composition. Using X-ray crystallography and mass spectrometry, the authors show that Ttg2D can carry two diacyl glycerophospholipids or a cardiolipin. The authors also identify a role for Ttg2D in resistance against antibiotics that use a lipid-mediated pathway into the cell.

    • Daniel Yero
    • Mireia Díaz-Lobo
    • Xavier Daura
    ResearchOpen Access
    Communications Biology
    Volume: 4, P: 1-16

  • Frustration in magnetic systems may lead to exotic quantum phases such as spin liquid and spin ice state. Here the authors demonstrate that compressive epitaxial strain in La2NiO4 films deposited on different substrates can tune antiferromagnetic exchange interactions and increase the degree of frustration through the increased level of incompatibility between exchange interactions.

    • Izabela Biało
    • Leonardo Martinelli
    • Johan Chang
    ResearchOpen Access
    Communications Physics
    Volume: 7, P: 1-7