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Showing 1–7 of 7 results
Advanced filters: Author: Justine Schlappa Clear advanced filters

  • At equilibrium, the ferroelectric polarization is proportional to the strain. At ultrafast timescales, an above-bandgap laser excitation decouples strain and polarization, which, out of equilibrium, is mainly determined by the photoexcited electrons.

    • Le Phuong Hoang
    • David Pesquera
    • Giuseppe Mercurio
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-10

  • Time-resolved X-ray scattering is utilized to demonstrate an ultrafast 300 ps topological phase transition to a skyrmionic phase. This transition is enabled by the formation of a transient topological fluctuation state.

    • Felix Büttner
    • Bastian Pfau
    • Stefan Eisebitt
    Research
    Nature Materials
    Volume: 20, P: 30-37

  • Warm dense copper, created by an X-ray free-electron laser, features a transition from reverse saturable absorption to saturable absorption. The results can be used to benchmark non-equilibrium models of electronic structure in warm dense matter.

    • Laurent Mercadier
    • Andrei Benediktovitch
    • Nina Rohringer
    ResearchOpen Access
    Nature Physics
    Volume: 20, P: 1564-1569

  • Quasi-1D magnetic insulators are very attractive for searching and studying quantum many-body phenomena. Here the authors report the four-spinon excitations in quasi-1D spin-chain cuprate Sr2CuO3 by momentum resolved RIXS technique which provides a new route for the creation of magnetic excitations in 1D materials.

    • J. Schlappa
    • U. Kumar
    • T. Schmitt
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • X-ray free electron lasers allow for studying the interaction of magnetic materials with intense X-rays beyond a linear response regime. Here, the authors demonstrate the onset of X-ray induced ultrafast demagnetization in Co/Pd multilayers via a redistribution of valence electrons on timescales shorter than 40 fs.

    • Daniel J. Higley
    • Alex H. Reid
    • Joachim Stöhr
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-9

  • Quasi-one-dimensional spin ladders are useful models to study collective many-body phenomena. Here, the authors investigate the excitations of weakly hole-doped cuprate ladders using oxygen K-edge resonant inelastic X-ray scattering revealing fingerprints of spin singlet multi-triplon bound state and continuum modes that are relevant to understanding various collective spin phenomena, such as Majorana fermions.

    • Yi Tseng
    • Eugenio Paris
    • Thorsten Schmitt
    ResearchOpen Access
    Communications Physics
    Volume: 6, P: 1-10