Linking the glass-forming ability to the Arrhenius crossover of structural relaxation

Abstract We studied on a link between the Arrhenius crossover (AC) of structural relaxation and the glass-forming ability (GFA) in fragile liquids based on the bond strength–coordination number fluctuation (BSCNF) model proposed by the authors. According to the BSCNF model, an Arrhenius-like relaxation behavior appears at high temperature due to the presence of large fluctuations with strong mean binding energy, which could lead to an enhancement of GFA. We show that this behavior is consistent with the experimental observation in fragile glass-formers and with the thermodynamic liquid model which enables to assess the free energy barrier between amorphous and crystalline phases. In the present study, the implication of the AC-like behavior of fragile systems is discussed in terms of the GFA.