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Showing 1–15 of 15 results
Advanced filters: Author: S. A. Grigera Clear advanced filters

  • Tests of the predictions of the renormalization group in biological experiments have not yet been decisive. Now, a study on the collective dynamics of insect swarms provides a long-sought match between experiment and theory.

    • Andrea Cavagna
    • Luca Di Carlo
    • Mattia Scandolo
    ResearchOpen Access
    Nature Physics
    Volume: 19, P: 1043-1049

  • Bird flocks are known to adjust the orientation and speed of individual birds giving rise to correlations that extend across very large groups. The authors show that marginal control provides an explanation of scale-free correlations of speed fluctuations in natural bird flocks of any sizes.

    • Andrea Cavagna
    • Antonio Culla
    • Pablo Villegas
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-11

  • A classical Hamiltonian captures key properties of spin ice materials such as residual entropy and fractionalized excitations. Here, the authors present experimental results of the polarization transition that motivate a Hamiltonian with lattice distortions, which predicts an intermediate magnetization state and competing ground state orders.

    • R. A. Borzi
    • F. A. Gómez Albarracín
    • S. A. Grigera
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-8

  • Swarms and statistical physics seem like natural bedfellows, but concepts like scaling are yet to prove directly applicable to insect group dynamics. A study of midges suggests they are, and that they may give rise to a new universality class.

    • Andrea Cavagna
    • Daniele Conti
    • Massimiliano Viale
    Research
    Nature Physics
    Volume: 13, P: 914-918

  • That the dynamical properties of a glass-forming liquid at high temperature are different from behaviour in the supercooled state has already been established. Numerical simulations now suggest that the static length scale over which spatial correlations exist also changes on approaching the glass transition.

    • G. Biroli
    • J.-P. Bouchaud
    • P. Verrocchio
    Research
    Nature Physics
    Volume: 4, P: 771-775

  • How do flocks of birds remain cohesive while dodging predators? A study tracking up to 400 starlings reveals that information propagates in a linear fashion and with no attenuation, meaning that the language of phase transitions in correlated materials can be used to describe flocking behaviour.

    • Alessandro Attanasi
    • Andrea Cavagna
    • Massimiliano Viale
    Research
    Nature Physics
    Volume: 10, P: 691-696

  • The application of a high magnetic field is shown to induce spin-density-wave order in Sr3Ru2O7. This magnetic order correlates with the electronic nematic behaviour observed in this material.

    • C. Lester
    • S. Ramos
    • S. M. Hayden
    Research
    Nature Materials
    Volume: 14, P: 373-378

  • Pyrochlore oxide lattices are home to many geometrically frustrated magnetic systems, including the celebrated spin ice. The authors present an Ising magnetic model on this structure, with a magnetoelastic term coupling the spin lattice to the O−2 ions which mediate superexchange. This model explains the presence of exotic forms of order found in previous experiments, allows stabilisation of some long-sought phases, and signals lattice distortions as a new probe for the complex magnetism of these materials.

    • D. Slobinsky
    • L. Pili
    • R. A. Borzi
    ResearchOpen Access
    Communications Physics
    Volume: 4, P: 1-11