Glass transition and re-entrant melting in a polydisperse hard-sphere fluid

Michio Tokuyama, Yayoi Terada

研究成果: Conference contribution

抄録

Extensive molecular dynamics simulations are performed for a hard-sphere fluid at 6% polydispersity. The simulation results are then analyzed based on the mean-field theory proposed recently by Tokuyama (Physica A 364, 23-62 (2006)). The phase diagram and the dynamic behavior are investigated fully in each phase. It is then found that as the volume fraction is increased, a supercooled liquid phase appears at the supercooled point β (≃ 0.5524) and a transition from supercooled liquid to crystal then occurs at the melting volume fraction m(1)(≃0.5625). As is further increased, a transition from crystal to supercooled liquid (re-entrant melting) is also observed at the second melting volume fraction m(2)(≃0.5770) within a waiting time tw = 7 × 104t0, where t0 is a time for a particle to move over a distance of a particle radius with an average velocity. The glass transition is thus predicted to occur at the glass transition volume fraction g (≃ 0.6005). The various aspects obtained in our study is quite similar to those in the experiment for the suspension of hard spheres, including the logarithmic growth of the mean-square displacement in fast-β stage, the non-singular behavior of the long-time self-diffusion coefficient, and the non divergence of any characteristic times, such as the α- and β-relaxation times.

本文言語English
ホスト出版物のタイトルFLOW DYNAMICS
ホスト出版物のサブタイトルThe Second International Conference on Flow Dynamics
ページ26-36
ページ数11
DOI
出版ステータスPublished - 2006 5 5
イベントFLOW DYNAMICS: The Second International Conference on Flow Dynamics - Sendai, Japan
継続期間: 2005 11 162005 11 18

出版物シリーズ

名前AIP Conference Proceedings
832
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherFLOW DYNAMICS: The Second International Conference on Flow Dynamics
国/地域Japan
CitySendai
Period05/11/1605/11/18

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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