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Showing 1–8 of 8 results
Advanced filters: Author: Rudolf Rüffer Clear advanced filters

  • Multiphoton superradiance is observed in a nuclear system excited by an X-ray free-electron laser. Tracking the system decay photon by photon shows strong enhancement of the first photon’s decay rate, in good agreement with Dicke’s formulation.

    • Aleksandr I. Chumakov
    • Alfred Q. R. Baron
    • Tetsuya Ishikawa
    Research
    Nature Physics
    Volume: 14, P: 261-264

  • Strong coupling between X-rays and matter excitations in arrays of alternating 57Fe and 56Fe layers is demonstrated. The results may open the door to X-ray quantum optics and strong coupling phenomena.

    • Johann Haber
    • Kai S. Schulze
    • Ralf Röhlsberger
    Research
    Nature Photonics
    Volume: 10, P: 445-449

  • Suitably shaped X-ray pulses are used to coherently steer the quantum dynamics of atoms’ nuclei rather than their electrons, with few-zeptosecond temporal stability of the phase control.

    • Kilian P. Heeg
    • Andreas Kaldun
    • Jörg Evers
    ResearchOpen Access
    Nature
    Volume: 590, P: 401-404

  • Rabi oscillations in the regime of hard X-rays are observed between two ensembles of the nuclear resonant isotope 57Fe. The sample system consists of two thin-film cavities stacked on top of each other, coupled through a thin interlayer.

    • Johann Haber
    • Xiangjin Kong
    • Ralf Röhlsberger
    Research
    Nature Photonics
    Volume: 11, P: 720-725

  • Carbonates are shown to exist in the lower mantle as seen in diamond inclusions, but thermodynamic constraints are poorly understood. Here, the authors synthesise two new iron carbonate compounds and find that self-oxidation-reduction reactions can preserve carbonates in the mantle.

    • Valerio Cerantola
    • Elena Bykova
    • Leonid Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9

  • The charge order transition of commonly known magnetite has only recently been unraveled. Here, the measurement of the low-temperature high-pressure phase diagram of a related material (Fe4O5) elucidates the interplay of average oxidation state and charge-ordering phenomena in the iron oxide family.

    • Sergey V. Ovsyannikov
    • Maxim Bykov
    • Leonid S. Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-11

  • Deposition of single molecule magnets onto surfaces is a key step for integration in devices exploiting their magnetic bistability and quantum properties. Here, Sessoli and colleagues exploit synchrotron Mössbauer spectroscopy to assess the effects of molecule-surface interactions on the magnetic properties of Fe(III) SMMs.

    • Alberto Cini
    • Matteo Mannini
    • Roberta Sessoli
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9