Ioffe-Regel criterion and viscoelastic properties of amorphous solids
| Autor: | D. A. Conyuh, Yaroslav M. Beltukov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Chain (algebraic topology) Condensed matter physics Plane (geometry) Molecular vibration Harmonic Relaxation (physics) FOS: Physical sciences Function (mathematics) Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks Viscoelasticity Amorphous solid |
| Popis: | We show that viscoelastic effects play a crucial role in the damping of vibrational modes in harmonic amorphous solids. The relaxation of a given plane elastic wave is described by a memory function of a semi-infinite one-dimensional mass-spring chain. The initial vibrational energy spreads from the first site of the chain to infinity. In the beginning of the chain, there is a barrier, which significantly reduces the decay of vibrational energy below the Ioffe-Regel frequency. To obtain the parameters of the chain, we present a numerically stable method, based on the Chebyshev expansion of the local vibrational density of states. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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