您现在的位置:首页 > 学科建设 > 亮点论文

张泽新教授与马余强教授课题组合作在Scientific Reports (IF 5.2)上发表研究论文

日期: 2016-09-29     阅读次数:642

标题:Directobservation of melting in a two-dimensional driven granular system
作者:XiaoyanSun1, Yang Li1, Yuqiang Ma1,2 & ZexinZhang1,3
  
论文摘要:
Melting is consideredto be one of the most fundamental problems in physical science. Generally,dimensionality plays an important role in melting. In three-dimension, it'swell known that a crystal melts directly into a liquid via a first-ordertransition. In two-dimensional (2D), however, the melting process has beenwidely debated whether it is a first-order transition or a two-step transitionwith an intermediate hexatic phase. Experimentally 2D melting has beenintensively studied in equilibrium systems such as molecular and colloidalcrystals, but rarely been explored in non-equilibrium system such as granularmaterials. In this paper, we experimentally studied the 2D melting in a drivengranular model system at single particle level using video recording andparticle tracking techniques. Measurements of orientational/translationalcorrelation functions show evidences that the melting is a two-step transition.A novel concept of orientational/translational susceptibilities enable us toclearly resolve the intermediate hexatic phase. Our results are in excellentagreement with the two-step melting scenario predicted by KTHNY theory, anddemonstrate that the KTHNY melting scenario can be extended to non-equilibriumsystems.
 
原文链接:http://dx.doi.org/10.1038/srep24056



返回


phyedu.suda.edu.cn | 苏州大学物理与光电•能源学部 物理科学与技术学院

Copyright © 苏州大学 2015, All Rights Reserved 苏州市十梓街1号

苏ICP备-002103