English

Exotic Acoustic-Edge and Thermal Scaling in Disordered Hyperuniform Networks

Soft Condensed Matter 2025-10-30 v1 Statistical Mechanics

Abstract

We develop a first-principles theory for the vibrational density of states (VDOS) and thermal properties of network materials built on stationary correlated disordered point configurations. For scalar (mass--spring) models whose dynamical matrix is a distance-weighted graph Laplacian, we prove that the limiting spectral measure is the pushforward of Lebesgue measure by a Fourier symbol that depends only on the edge kernel ff and the two-point statistics g2g_2 (equivalently the structure factor SS). For hyperuniform systems with small-kk scaling S(k)kαS(k)\sim k^\alpha and compensated kernels, {the VDOS exhibits an algebraic \emph{pseudogap} at low frequency, g(ω)ω2d/β1g(\omega)\sim \omega^{\,2d/\beta-1} with β=min{4,α+2}\beta=\min\{4,\alpha+2\}, which implies a low-temperature specific heat C(T)T2d/βC(T)\sim T^{\,2d/\beta} and a heat-kernel decay Z(t)td/βZ(t)\sim t^{-d/\beta}, defining a spectral dimension ds=2d/βd_s=2d/\beta.} This hyperuniformity-induced algebraic edge depletion could enable novel wave manipulation and low-temperature applications. Generalization to vector mechanical models and implications on material design are also discussed.

Keywords

Cite

@article{arxiv.2510.25136,
  title  = {Exotic Acoustic-Edge and Thermal Scaling in Disordered Hyperuniform Networks},
  author = {Yang Jiao},
  journal= {arXiv preprint arXiv:2510.25136},
  year   = {2025}
}