Simulations reveal that persistent activity reshapes cooperatively rearranging regions in active glasses with non-monotonic persistence dependence, but facilitation length collapses onto a diffusive scaling when rescaled by persistence length.
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The boson peak arises from accumulation of vibrational spectral weight in a narrow frequency window that is only weakly dependent on wavevector, manifesting as a flat band in the dynamical structure factor rather than a propagating excitation.
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Dynamical Facilitation in Active Glass Formers: Role of Morphology and Persistence
Simulations reveal that persistent activity reshapes cooperatively rearranging regions in active glasses with non-monotonic persistence dependence, but facilitation length collapses onto a diffusive scaling when rescaled by persistence length.
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A flat-band perspective on the boson peak in amorphous solids
The boson peak arises from accumulation of vibrational spectral weight in a narrow frequency window that is only weakly dependent on wavevector, manifesting as a flat band in the dynamical structure factor rather than a propagating excitation.