Disordered hyperuniformity in two-component nonadditive hard-disk plasmas
Disordered hyperuniformity in two-component nonadditive hard-disk plasmas
复制标题
双组分非相加硬盘等离子体中的无序超均匀性
DOI：
10.1103/physreve.96.062126
复制
发表时间：
2017
影响因子：
2.4
通讯作者：
Torquato, Salvatore
中科院分区：
文献类型：
--
作者：
Lomba, Enrique;Weis, Jean-Jacques;Torquato, Salvatore
研究了由非加性硬盘组成的经典双组分离子等离子体的行为，其中硬盘之间具有附加的对数库仑相互作用。由于库仑排斥，长波长的总密度涨落被抑制，系统是全局超均匀的。短程体积效应导致相分离或杂配位的积极或消极的非加和性，分别。这些效应与超均匀性所强加的隐藏的长程有序相竞争。因此，混合物的临界行为被修改，当系统被充电时，长波长的浓度波动被部分阻尼。它还表明，由于超均匀性的组态熵的减少源于超过两个粒子的水平的贡献。最后，尽管全球超均匀性，我们表明，在我们的系统中，与每个组件分别相关的空间配置不是超均匀的，即，该系统不是“多超均匀的”。
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.”