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Showing 1–11 of 11 results
Advanced filters: Author: I Nisoli Clear advanced filters

  • The first steps of charge transfer in molecules after their interaction with light occur on an ultrafast timescale. Now, by combining attosecond pump/few-femtosecond probe spectroscopy with quantum chemistry calculations, it has been shown that a concerted nuclear and electronic motion drives electron transfer in donor–π–acceptor molecules on a sub-10-fs timescale.

    • Federico Vismarra
    • Francisco Fernández-Villoria
    • Mauro Nisoli
    ResearchOpen Access
    Nature Chemistry
    Volume: 16, P: 2017-2024

  • Floquet engineering aims at inducing new properties in materials with light. Here the authors have used pulses of variable durations, to investigate its applicability in the femtosecond domain. Surprisingly, they found that it holds to the few-cycle limit.

    • Matteo Lucchini
    • Fabio Medeghini
    • Mauro Nisoli
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Attosecond streaking is used to study the dynamics of electron scattering in dielectric nanoparticles in real time. Revealing the mechanisms involved is the first step towards understanding electron scattering in more complex dielectrics.

    • L. Seiffert
    • Q. Liu
    • M. F. Kling
    Research
    Nature Physics
    Volume: 13, P: 766-770

  • Spin ice materials are defined by ice rules, local constraints that lead to frustrated interactions and macroscopic numbers of degenerate configurations. Here the authors show that the ice rule in colloidal ice is emergent, limited to certain geometries, and demonstrate how it can break down under changes of the lattice structure.

    • András Libál
    • Dong Yun Lee
    • Cristiano Nisoli
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-10

  • Attosecond (10−18 s) laser pulses make it possible to peer into the inner workings of atoms and molecules on the electronic timescale — phenomena in solids have already been investigated in this way. Here, an attosecond pump–probe experiment is reported that investigates the ionization and dissociation of hydrogen molecules, illustrating that attosecond techniques can also help explore the prompt charge redistribution and charge localization that accompany photoexcitation processes in molecular systems.

    • G. Sansone
    • F. Kelkensberg
    • M. J. J. Vrakking
    Research
    Nature
    Volume: 465, P: 763-766

  • The topological charge in colloidal ice indicates the particle arrangements at a vertex, or effective spins as in magnetic spin ice but it is not clear how the geometrical constrains of lattices affect these charges. The authors control the location of such charges via geometry transformations, in turn controlling the ice rule in a colloidal ice.

    • Carolina Rodríguez-Gallo
    • Antonio Ortiz-Ambriz
    • Pietro Tierno
    ResearchOpen Access
    Communications Physics
    Volume: 6, P: 1-7

  • Memristors are reconfigurable devices that are switchable between low and high resistive states and are expected to play an important role in the integrated circuit technology of next generation computing. Here, the authors theoretically demonstrate that ring-shaped nanostructures composed of a ferromagnetic material can exhibit memristive properties with performance values in the GHz range.

    • Francesco Caravelli
    • Ezio Iacocca
    • Clodoaldo I. L. de Araujo
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-11