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Showing 1–11 of 11 results
Advanced filters: Author: Michael Först Clear advanced filters

  • Intense light pulses can induce symmetry breaking, as for the generation of ferroelectricity in SrTiO3. Using ultrafast X-ray diffuse scattering at a free-electron laser, nonlinear phonon interactions that occur on such mid-IR excitation are observed, with a theory for the dynamics presented.

    • M. Fechner
    • M. Först
    • A. Cavalleri
    ResearchOpen Access
    Nature Materials
    Volume: 23, P: 363-368

  • Despite exhibiting ferroelectric features, SrTiO3 fails to display long-range polar order at low temperatures due to quantum fluctuations. An ultrafast X-ray diffraction experiment now probes polar dynamics of this material at the nanometre scale.

    • Gal Orenstein
    • Viktor Krapivin
    • Mariano Trigo
    Research
    Nature Physics
    Volume: 21, P: 961-965

  • This paper shows how lattice distortions induced by a laser pulse can create a ferrimagnetic moment in an antiferromagnet. This mechanism gives a magnetic response that is orders of magnitude larger than using mechanical strain.

    • Ankit S. Disa
    • Michael Fechner
    • Andrea Cavalleri
    Research
    Nature Physics
    Volume: 16, P: 937-941

  • Light can interact with the electrons in a crystalline solid, which in turn generates lattice vibrations or phonons. A related phenomenon was proposed 40 years ago in which it is the ions in the crystal rather than the electrons that mediate the interaction. This effect, known as ionic Raman scattering, is now observed experimentally.

    • M. Först
    • C. Manzoni
    • A. Cavalleri
    Research
    Nature Physics
    Volume: 7, P: 854-856

  • In quantum materials, ultrashort light pulses can induce transitions between electronic phases, switch ferroic orders and unveil non-equilibrium emergent behaviours. Here, we review the use of femtosecond X-ray pulses in tracking the underlying dynamics of the structural, electronic and magnetic order in these systems.

    • Michele Buzzi
    • Michael Först
    • Andrea Cavalleri
    Reviews
    Nature Reviews Materials
    Volume: 3, P: 299-311

  • Light-induced superconductivity is a recent phenomenon where many aspects of the underlying physics are still to be fully understood. Here, the authors analyse coupled Ginzburg-Landau and Maxwell equations to investigate the dynamics of the quantum states when a superconductor is irradiated by a laser pulse.

    • Pavel E. Dolgirev
    • Alfred Zong
    • Eugene Demler
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-9