Central role of thermal collective strain in the relaxation of structure in a supercooled liquid

被引：15

作者：

Widmer-Cooper, Asaph ^{[1
,2
]}

Harrowell, Peter ^{[1
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW E | 2009年 / 80卷 / 06期

关键词：

glass transition; liquid mixtures; liquid theory; molecular dynamics method; plastic flow; stress relaxation; supercooling; DYNAMICS; DEFORMATION; MIXTURE; FLOW;

D O I：

10.1103/PhysRevE.80.061501

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：

The spatial distribution of structural relaxation in a supercooled liquid is studied using molecular dynamics simulations of a two-dimensional binary mixture. It is shown that the spatial heterogeneity of the relaxation along with the time scale of the relaxation is determined, not by the frequency with which particles move a distance pi/2k(Bragg), but by the frequency with which particles can achieve persistent displacements. We show that these persistent displacements are achieved through the coupled action of local reorganizations and unrecoverable thermal strains.

引用

页数：6

共 36 条

[1] Topological persistence and dynamical heterogeneities near jamming [J].

Abate, A. R. ;

Durian, D. J. .

PHYSICAL REVIEW E, 2007, 76 (02)

[2] PLASTIC-FLOW IN A DISORDERED BUBBLE RAFT (AN ANALOG OF A METALLIC GLASS) [J].

ARGON, AS ;

KUO, HY .

MATERIALS SCIENCE AND ENGINEERING, 1979, 39 (01) :101-109

[3] Kinetic Theory of Plastic Flow in Soft Glassy Materials [J].

Bocquet, Lyderic ;

Colin, Annie ;

Ajdari, Armand .

PHYSICAL REVIEW LETTERS, 2009, 103 (03)

[4] On the Adam-Gibbs-Kirkpatrick-Thirumalai-Wolynes scenario for the viscosity increase in glasses [J].

Bouchaud, JP ;

Biroli, G .

JOURNAL OF CHEMICAL PHYSICS, 2004, 121 (15) :7347-7354

[5] Building Blocks of Dynamical Heterogeneities in Dense Granular Media [J].

Candelier, R. ;

Dauchot, O. ;

Biroli, G. .

PHYSICAL REVIEW LETTERS, 2009, 102 (08)

[6] Lengthscale dependence of dynamic four-point susceptibilities in glass formers [J].

Chandler, David ;

Garrahan, Juan P. ;

Jack, Robert L. ;

Maibaum, Lutz ;

Pan, Albert C. .

PHYSICAL REVIEW E, 2006, 74 (05)

[7] Simple three-state lattice model for liquid water [J].

Ciach, Alina ;

Gozdz, Wojciech ;

Perera, Aurelien .

PHYSICAL REVIEW E, 2008, 78 (02)

[8] Dynamical heterogeneity in a dense quasi-two-dimensional colloidal liquid [J].

Cui, BX ;

Lin, BH ;

Rice, SA .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (20) :9142-9155

[9] Dynamical heterogeneity close to the jamming transition in a sheared granular material [J].

Dauchot, O ;

Marty, G ;

Biroli, G .

PHYSICAL REVIEW LETTERS, 2005, 95 (26)

[10] What does the potential energy landscape tell us about the dynamics of supercooled liquids and glasses? [J].

Doliwa, B ;

Heuer, A .

PHYSICAL REVIEW LETTERS, 2003, 91 (23) :235501-235501

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