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Updated: Aug 6, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Further testing the validity of generalized heterogeneous-elasticity theory for low-frequency excitations in
Walter Schirmacher1,2, Matteo Paoluzzi3, Felix Cosmin Mocanu4
1Universität Mainz, Institut für Physik, Staudinger Weg 7, D-55099 Mainz, Germany.
None:
We summarize the salient features of our theory of nonphononic vibrational excitations in glasses [W. Schirmacher et al., Nat. Commun. 15, 3107 (2024)10.1038/s41467-024-46981-7]. Next, we provide further evidence of the nonuniversality of the ω^{4} scaling of the nonphononic vibrational density of states (DoS), and the existence of an important class of nonphononic excitations in glasses, which we call defect states. These modes are induced by frozen-in stresses and can be classified as quasilocalized. Our results suggest that the commonly observed low-frequency ω^{4} scaling of the nonphononic vibrational density of states is highly dependent on the technical aspects of the molecular dynamics simulations employed to compute the DoS.
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