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Showing 1–3 of 3 results
Advanced filters: Author: Laurent Mercadier 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

  • 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

  • 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