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Showing 1–12 of 12 results
Advanced filters: Author: Stefano Agrestini Clear advanced filters

  • Our experimental proof of chiral phonons demonstrates a degree of freedom in condensed matter that is of fundamental importance and opens the door to exploration of emergent phenomena based on chiral bosons.

    • Hiroki Ueda
    • Mirian García-Fernández
    • Urs Staub
    ResearchOpen Access
    Nature
    Volume: 618, P: 946-950

  • In this work, authors show that O-redox in 4d and 5d transition metal oxides involves the formation of molecular oxygen trapped in the particles. These results are in accord with observations in 3d oxides and show that the greater covalency of the 4d and 5d oxides does not stabilise peroxo-like species.

    • Robert A. House
    • John-Joseph Marie
    • Peter G. Bruce
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Unconventional superconductivity is often associated with the presence of other kinds of electronic order. Observations of charge order in infinite-layer nickelate superconductors show that they fit this pattern.

    • Matteo Rossi
    • Motoki Osada
    • Wei-Sheng Lee
    Research
    Nature Physics
    Volume: 18, P: 869-873

  • It was recently found that a certain nickelate compound, La3Ni2O7, at moderately high pressures has a superconducting phase that persists to above liquid nitrogen temperatures. Here, by studying the parent phase at ambient pressure, Chen et al uncover rich magnetic properties and show the vital role of the strong bonding of the inter-layer Ni orbitals in the magnetic and electronic excitations.

    • Xiaoyang Chen
    • Jaewon Choi
    • Donglai Feng
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • Oxygen redox cathodes deliver higher energy densities than those based on transition metal redox but commonly exhibit voltage fade on extended cycling. The loss of O-redox capacity and voltage fade is shown to arise from a reduction in O2−/O2 redox process reversibility and O2 loss.

    • John-Joseph Marie
    • Robert A. House
    • Peter G. Bruce
    ResearchOpen Access
    Nature Materials
    Volume: 23, P: 818-825

  • In optimally doped Nd0.8Sr0.2NiO2H epitaxial film, combined state-of-the-art experimental and theoretical approaches show abundant hydrogen with zero resistivity, and its critical role in superconductivity in epitaxial infinite-layer nickelates.

    • Xiang Ding
    • Charles C. Tam
    • Liang Qiao
    Research
    Nature
    Volume: 615, P: 50-55

  • Spin orbit coupling (SOC) is a feature crucial to many interesting physics phenomena ranging from Mott insulators to topological insulators. Here, the authors use resonant inelastic X-ray scattering to study the low-energy excitations of the Mott insulator, Ca2RuO4, and reveal the orbital character of the magnetic properties of the system.

    • Karin von Arx
    • Pascal Rothenbühler
    • Johan Chang
    ResearchOpen Access
    Communications Physics
    Volume: 8, P: 1-7

  • The authors present evidence for the formation of commensurate charge order in non-superconducting thin films of infinite-layer nickelates, whereas they find no charge order in a superconducting film.

    • Charles C. Tam
    • Jaewon Choi
    • Ke-Jin Zhou
    Research
    Nature Materials
    Volume: 21, P: 1116-1120

  • 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