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题名: Direct observation of melting in a two-dimensional driven granular system
作者: Sun, XY ;  Li, Y ;  Ma, YQ ;  Zhang, ZX
刊名: SCIENTIFIC REPORTS
出版日期: 2016
卷号: 6, 页码:24056
学科分类: Science & Technology - Other Topics
DOI: http://dx.doi.org/10.1038/srep24056
通讯作者: Ma, YQ ;  Zhang, ZX (reprint author), Soochow Univ, Ctr Soft Condensed Matter Phys & Interdisciplinar, Suzhou 215006, Peoples R China. ;  Ma, YQ (reprint author), Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China. ;  Ma, YQ (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China. ;  Zhang, ZX (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: Melting is considered to be one of the most fundamental problems in physical science. Generally, dimensionality plays an important role in melting. In three-dimension, it's well known that a crystal melts directly into a liquid via a first-order transition. In two-dimension (2D), however, the melting process has been widely debated whether it is a first-order transition or a two-step transition with an intermediate hexatic phase. Experimentally 2D melting has been intensively studied in equilibrium systems such as molecular and colloidal crystals, but rarely been explored in non-equilibrium system such as granular materials. In this paper, we experimentally studied the 2D melting in a driven granular model system at single particle level using video recording and particle tracking techniques. Measurements of orientational/translational correlation functions show evidences that the melting is a two-step transition. A novel concept of orientational/translational susceptibilities enable us to clearly resolve the intermediate hexatic phase. Our results are in excellent agreement with the two-step melting scenario predicted by KTHNY theory, and demonstrate that the KTHNY melting scenario can be extended to non-equilibrium systems.
类目[WOS]: Multidisciplinary Sciences
关键词[WOS]: BOND-ORIENTATIONAL ORDER ;  2 DIMENSIONS ;  TRANSITION ;  LATTICE ;  DISKS ;  GAS
收录类别: SCI
项目资助者: National Basic Research Program of China [2012CB821500] ;  National Natural Science Foundation of China [21522404, 21174101, 11574222] ;  Project for Jiangsu Scientific and Technological Innovation Team ;  Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21701
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Sun, XY,Li, Y,Ma, YQ,et al. Direct observation of melting in a two-dimensional driven granular system[J]. SCIENTIFIC REPORTS,2016,6:24056.
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