World beyond the nearest neighbors. (3rd March 2023)

• Record Type: Journal Article
• Authors: Egami, Takeshi; Ryu, Chae Woo
• Is Part Of: Journal of physics. Volume 35:Number 17(2023)
• Publication Date: 2023-03-03
• Subjects: liquid and glass -- medium-range order -- density wave -- viscosity and deformation; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/acbe24
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The structure beyond the nearest neighbor atoms in liquid and glass is characterized by the medium-range order (MRO). In the conventional approach, the MRO is considered to result directly from the short-range order (SRO) in the nearest neighbors. To this bottom–up approach starting with the SRO, we propose to add a top–down approach in which global collective forces drive liquid to form density waves. The two approaches are in conflict with each other, and the compromise produces the structure with the MRO. The driving force to produce density waves provides the stability and stiffness to the MRO, and controls various mechanical properties. This dual framework provides a novel perspective for description of the structure and dynamics of liquid and glass.