Extensive numerical work from recent years has established that the low-frequency nonphononic vibrational spectrum of structural glasses follows an ∼ω4 scaling with angular frequency ω.1 This universal quartic (∼ω4) law featured by the nonphononic spectrum has been shown to be independent of the details of the interparticle interaction potential,2 glass formation protocol,3 and spatial dimensions đ ≥ 2.4,5 Furthermore, indirect evidence for the quartic scaling of the nonphononic spectrum of two-dimensional structural glasses was presented in Refs. 1 and 6–8. In Refs. 4 and 7, it was shown that in two-dimensional structural glasses, the prefactor ωg5 of the quartic ∼ω4 law is N-dependent, scaling as ωg5(logN)5, where N denotes the number of particles in a glass. At the...

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