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arXiv · 2609.39541

On the Relation Between the Boson Peak and the Vibrational Phases in Glasses

Philip Rasmussen·Søren S. Sørensen
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Abstract

The boson peak is a vibrational feature commonly found in glassy and disordered systems described as the deviation from the scaling of the Debye model ($g({E}){\propto}{E}^2$). Despite much interest, the microscopic nature of the vibrations is only anecdotally discussed. Here we report how the boson peak appears in conjunction with a crossover from localized to extended but non-wave-like and coincide with a maximum in phase coherence and spatial periodicity. Our analyses provide new insights into the microscopic origin of the boson peak across a wide range of glasses.

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Philip Rasmussen, Søren S. Sørensen. 2026-09-30. On the Relation Between the Boson Peak and the Vibrational Phases in Glasses. https://arxiv.org/abs/2609.39541

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