Jamming in confined geometry:Criticality of the jamming transition and implications of structural relaxation in confined supercooled liquids

作     者：Jun Liu Hua Tong Yunhuan Nie Ning Xu 柳军;童华;聂运欢;徐宁

作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Key Laboratory of Microscale Magnetic Resonanceand Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2020年第29卷第12期

页      面：93-98页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11734014) 

主　　题：jamming transition supercooled liquids amorphous solids criticality 

摘      要：In marginally jammed solids confined by walls,we calculate the particle and ensemble averaged value of an order parameter,Ψ(r),as a function of the distance to the wall,*** a microscopic indicator of structural disorder and particle mobility in solids,Ψis by definition the response of the mean square particle displacement to the increase of temperature in the harmonic approximation and can be directly calculated from the normal modes of vibration of the zerotemperature *** find that,in confined jammed solids,Ψ(r)curves at different pressures can collapse onto the same master curve following a scaling function,indicating the criticality of the jamming *** scaling collapse suggests a diverging length scale and marginal instability at the jamming transition,which should be accessible to sophisticatedly designed ***,Ψ(r)is found to be significantly suppressed when approaching the wall and anisotropic in directions perpendicular and parallel to the *** finding can be applied to understand the r-dependence and anisotropy of the structural relaxation in confined supercooled liquids,providing another example of understanding or predicting behaviors of supercooled liquids from the perspective of the zero-temperature amorphous solids.