Increasing the density melts ultrasoft colloidal glasses

被引:82
作者
Berthier, Ludovic [1 ]
Moreno, Angel J. [2 ,3 ]
Szamel, Grzegorz [4 ]
机构
[1] Univ Montpellier 2, CNRS, UMR 5587, Lab Colloides Verres & Nanomat, F-34095 Montpellier, France
[2] Univ Basque Country, CSIC, Ctr Fis Mat, E-20018 San Sebastian, Spain
[3] Mat Phys Ctr, E-20018 San Sebastian, Spain
[4] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA
来源
PHYSICAL REVIEW E | 2010年 / 82卷 / 06期
关键词
SOFT; SUSPENSIONS; BEHAVIOR; FLUID;
D O I
10.1103/PhysRevE.82.060501
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We use theory and simulations to investigate the existence of amorphous glassy states in ultrasoft colloids. We combine the hypernetted chain approximation with mode-coupling theory to study the dynamic phase diagram of soft repulsive spheres interacting with a Hertzian potential, focusing on low temperatures and large densities. At constant temperature, we find that an amorphous glassy state is entered upon compression, as in colloidal hard spheres, but the glass unexpectedly melts when density increases further. We attribute this reentrant fluid-glass transition to particle softness and correlate this behavior to previously reported anomalies in soft systems, thus emphasizing its generality. The predicted fluid-glass-fluid sequence is confirmed numerically.
引用
收藏
页数:4
相关论文
共 27 条
[1]   Scaling of the glassy dynamics of soft repulsive particles: A mode-coupling approach [J].
Berthier, Ludovic ;
Flenner, Elijah ;
Jacquin, Hugo ;
Szamel, Grzegorz .
PHYSICAL REVIEW E, 2010, 81 (03)
[2]   Glass transition of dense fluids of hard and compressible spheres [J].
Berthier, Ludovic ;
Witten, Thomas A. .
PHYSICAL REVIEW E, 2009, 80 (02)
[3]   Foam mechanics at the bubble scale [J].
Durian, DJ .
PHYSICAL REVIEW LETTERS, 1995, 75 (26) :4780-4783
[4]   Waterlike dynamic anomalies in a liquid described by a core-softened potential [J].
Egorov, S. A. .
JOURNAL OF CHEMICAL PHYSICS, 2008, 128 (17)
[5]   Relaxation in a glassy binary mixture: Comparison of the mode-coupling theory to a Brownian dynamics simulation [J].
Flenner, E ;
Szamel, G .
PHYSICAL REVIEW E, 2005, 72 (03)
[6]   Structural arrest in dense star-polymer solutions [J].
Foffi, G ;
Sciortino, F ;
Tartaglia, P ;
Zaccarelli, E ;
Lo Verso, F ;
Reatto, L ;
Dawson, KA ;
Likos, CN .
PHYSICAL REVIEW LETTERS, 2003, 90 (23) :4
[7]  
Gotze W., 2008, COMPLEX DYNAMICS GLA
[8]  
Hansen J., 2013, Theory of Simple Liquids: with Applications to Soft Matter
[9]  
IKEDA A, ARXIV10082597
[10]   Anomalous structural evolution of soft particles: equibrium liquid state theory [J].
Jacquin, Hugo ;
Berthier, Ludovic .
SOFT MATTER, 2010, 6 (13) :2970-2974