Open AccessPhase transition in the high-order nonideal mixing model
Author(s) -
Lihua Wang,
Yujing Dong
Publication year - 2020
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
ISSN - 2399-6528
DOI - 10.1088/2399-6528/ab944f
Subject(s) - mixing (physics) , phase transition , statistical physics , first order , order (exchange) , quantum critical point , critical point (mathematics) , transition point , phase (matter) , transition (genetics) , landau theory , quantum phase transition , physics , mathematics , condensed matter physics , quantum mechanics , thermodynamics , mathematical analysis , chemistry , biochemistry , finance , gene , economics
We extend the existing second-order nonideal mixing model, which only formally allows for the second-order phase transition, into the fourth-order. The Landau theory reveals that both first- and second-order phase transitions may exist in this higher-order model. Moreover, we show that a single structural parameter determines whether the phase transition abruptly switches between first- and second- orders. We note, it provides an explanation of either appearance or absence of the liquid-liquid critical point in the liquid-liquid phase transition on debate.