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arXiv 2104.14645cond-mat.stat-mechcond-mat.soft
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3 ~ 10维硬球晶体的热力学稳定性

Thermodynamic stability of hard sphere crystals in dimensions 3 through 10

Patrick Charbonneau, Caitlin M. Gish, Robert S. Hoy, Peter K. Morse

摘要:

虽然对硬球的亚稳液体分支--从低维$d$到${d\to\infty}$ --有很多了解,但它的晶体对应物$d>3$仍然很大程度上未被探索。特别是,尚不清楚在高维度中晶体相是否是化学稳定的,因此晶体的平均场论是否是精确的。为了确定硬球晶体的稳定范围,本文通过数值模拟估算了硬球晶体的状态方程,并利用广义Frenkel-Ladd方案计算了晶体的绝对自由能,确定了流体-晶体共存条件。结果表明,晶相至少在达到$d=10$之前是稳定的,并且尺寸趋势表明晶体稳定性可能持续超过该点。

英文摘要:

Although much is known about the metastable liquid branch of hard spheres--from low dimension $d$ up to ${d\to\infty}$--its crystal counterpart remains largely unexplored for $d>3$. In particular, it is unclear whether the crystal phase is thermodynamically stable in high dimensions and thus whether a mean-field theory of crystals can ever be exact. In order to determine the stability range of hard sphere crystals, their equation of state is here estimated from numerical simulations, and fluid-crystal coexistence conditions are determined using a generalized Frenkel-Ladd scheme to compute absolute crystal free energies. The results show that the crystal phase is stable at least up to $d=10$, and the dimensional trends suggest that crystal stability likely persists well beyond that point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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