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- W4317438963 abstract "The vibrational density of states of glasses is considerably different from that of crystals. In particular, there exist spatially localized vibrational modes in glasses. The density of states of these non-phononic modes has been observed to follow $g(omega) propto omega^4$, where $omega$ is the frequency. However, in two-dimensional systems, the abundance of phonons makes it difficult to accurately determine this non-phononic density of states because they are strongly coupled to non-phononic modes and yield strong system-size and preparation-protocol dependencies. In this article, we utilize the random pinning method to suppress phonons and disentangle their coupling with non-phononic modes and successfully calculate their density of states as $g(omega) propto omega^4$. We also study their localization properties and confirm that low-frequency non-phononic modes in pinned systems are truly localized without far-field contributions. We finally discuss the excess density of states over the Debye value that results from the hybridization of phonons and non-phononic modes." @default.
- W4317438963 created "2023-01-19" @default.
- W4317438963 creator A5021823131 @default.
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- W4317438963 date "2023-01-15" @default.
- W4317438963 modified "2023-10-14" @default.
- W4317438963 title "Non-phononic density of states of two-dimensional glasses revealed by random pinning" @default.
- W4317438963 doi "https://doi.org/10.48550/arxiv.2301.06225" @default.
- W4317438963 hasPublicationYear "2023" @default.
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