2017/10/25 by E. Lomba, J. J. Weis, Jean-Jacques Weis +2 · 32 citations
Earth and Planetary Sciences · Engineering · Materials Science · Mathematics · Physics and Astronomy · #Chemical physics #Component (thermodynamics) #Condensed matter physics #Configuration entropy #Coulomb #Entropy (arrow of time) #High-pressure geophysics and materials #Logarithm #Material Dynamics and Properties #Materials science #Mathematics #Particle system #Phase (matter) #Phase Equilibria and Thermodynamics #Physics #Plasma #Quantum mechanics #Range (aeronautics) #Statistical physics #Thermodynamics #Wavelength #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreve.96.062126
published in Physical review. E 96(6), 062126 (American Physical Society)
arxiv created 2017/10/25 · openalex publication_date 2017/12/18 · arxiv updated 2017/12/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We 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."