Two-body entropy of two-dimensional fluids

BA Klumov and SA Khrapak, RESULTS IN PHYSICS, 17, 103020 (2020).

DOI: 10.1016/j.rinp.2020.103020

The two-body (pair) contribution to the entropy of two-dimensional Yukawa systems is calculated and analyzed. It is demonstrated that in the vicinity of the fluid-solid (freezing) phase transition the pair entropy exhibits an abrupt jump in a narrow temperature range and this can be used to identify the freezing point. Relations to the full excess entropy and some existing freezing indicators are briefly discussed.

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