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Showing 1–5 of 5 results
Advanced filters: Author: Hirofumi Akamatsu Clear advanced filters

  • Oxynitrides are garnering interest because of their variety of novel properties, but their synthesis has typically involved highly reducing conditions that put significant constraints on their composition, structure and properties. Now, the lability of H− in perovskite oxyhydride BaTiO3−xHx has enabled H–/N3– exchange at a lower temperature, yielding a ferroelectric oxynitride BaTiO3−xN2x/3.

    • Takeshi Yajima
    • Fumitaka Takeiri
    • Hiroshi Kageyama
    Research
    Nature Chemistry
    Volume: 7, P: 1017-1023

  • Materials that combine metallic behaviour with stable electric polarization are scarce despite being proposed in the 1960s. Here the authors engineer a perovskite heterostructure where 2D polar metallic behavior coexists with built-in electric polarization from the displacement of B-site titanium cations.

    • Yanwei Cao
    • Zhen Wang
    • J. Chakhalian
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9

  • X-ray observations of the core of the Perseus cluster reveal a remarkably quiescent atmosphere in which the gas has a line-of-sight velocity dispersion of about 164 kilometres per second in the region 30–60 kiloparsecs from the central nucleus; turbulent pressure support in the gas is four per cent of the thermodynamic pressure, necessitating only a small correction to the total cluster mass determined from hydrostatic equilibrium.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 535, P: 117-121

  • High-resolution X-ray spectra show near-solar abundances of chromium, manganese and nickel with respect to iron in the Perseus cluster, suggesting that the progenitors of type Ia supernovae could be near- and sub-Chandrasekhar-mass white dwarfs.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 551, P: 478-480