Density of quasi-localized modes in athermal glasses
- 1 September 2021
- journal article
- research article
- Published by IOP Publishing in Europhysics Letters
- Vol. 135 (6), 66001
- https://doi.org/10.1209/0295-5075/ac27e6
Abstract
A careful examination of the Quasi-Localized Modes (QLM) that exist in a generic atomistic model of a glass former reveals at least two types of them, each exhibiting a different density of states, one depending on the frequency as $\omega^3$ and the other as $\omega^4$. The properties of the glassy energy landscape that is responsible for the two types of modes is examined here, explaining the analytic feature responsible for the creations of (at least) two families of QLM's. It is argued that the QLM's that are revealed by diagonalizing the Hessian matrix are not related to possibly existing Two-Level Systems (TLS).
Keywords
Funding Information
- Minerva Foundation
- US-Israel Binational Science Foundation
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