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Disordered hyperuniformity in two-component nonadditive hard-disk plasmas

AuthorsLomba, Enrique ; Weis, J.J.; Torquato, S.
Issue Date2017
CitationPhysical Review E 96 (2017)
AbstractWe study the behavior of a classical two-component ionic plasma made up of nonadditive hard disks with additional logarithmic Coulomb interactions between them. Due to the Coulomb repulsion, long-wavelength total density fluctuations are suppressed and the system is globally hyperuniform. Short-range volume effects lead to phase separation or to heterocoordination for positive or negative nonadditivities, respectively. These effects compete with the hidden long-range order imposed by hyperuniformity. As a result, the critical behavior of the mixture is modified, with long-wavelength concentration fluctuations partially damped when the system is charged. It is also shown that the decrease of configurational entropy due to hyperuniformity originates from contributions beyond the two-particle level. Finally, despite global hyperuniformity, we show that in our system the spatial configuration associated with each component separately is not hyperuniform, i.e., the system is not >multihyperuniform.
Identifiersdoi: 10.1103/PhysRevE.96.062126
issn: 2470-0053
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