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Showing 1–6 of 6 results
Advanced filters: Author: Jo Verbeeck Clear advanced filters

  • It was demonstrated recently that passing electrons through a spiral stack of graphite thin films generates an electron beam with orbital angular momentum — analogous to the spiralling wavefronts that can be introduced in photon beams and which have found widespread application. Here, a versatile holographic technique for generating these twisted electron beams is described. Moreover, a demonstration is provided of their potential use in probing a material's magnetic properties.

    • J. Verbeeck
    • H. Tian
    • P. Schattschneider
    Research
    Nature
    Volume: 467, P: 301-304

  • 3d transition metal nanoparticles are of interest in fields ranging from spintronics, catalysis, and biomedicine. This paper provides a detailed picture of the oxidation of cobalt nanoparticles and benchmarks the development of models for the metal oxidation and magnetic phenomena at the nanoscale.

    • Jaianth Vijayakumar
    • Tatiana M. Savchenko
    • Armin Kleibert
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-11

  • Magnetic monopoles continue to be elusive. However, an experiment now shows that the interaction of an electron beam with the tip of a nanoscopically thin magnetic needle—a close approximation to a magnetic monopole field—generates an electron vortex state, as expected for a true magnetic monopole field.

    • Armand Béché
    • Ruben Van Boxem
    • Jo Verbeeck
    Research
    Nature Physics
    Volume: 10, P: 26-29

  • The sign of the field in plasmonic excitations cannot be accessed by direct measurements. Here Guzzinatiet al. overcome this limitation by shaping the wavefunction of an electron beam to match the symmetry of the plasmon’s charge symmetry, offering selective detection of specific plasmon modes.

    • Giulio Guzzinati
    • Armand Béché
    • Jo Verbeeck
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8