標題: Microscopic morphology and energy surface landscape in a supercooled soft-sphere system
作者: Ma, WJ
Wu, TM
物理研究所
Institute of Physics
關鍵字: instantaneous normal modes;supercooled;cluster;percolation
公開日期: 15-六月-2000
摘要: We carry out a systematic study on the microscopic morphology and its relationship with the signatures of the traces swept over the potential energy surface in a soft-sphere fluid system interacting via a truncated Lennard-Jones potential. The state of the model system is tuned by changing its temperature obtained in a molecular dynamics simulation, ranging from the equilibrium fluid phase to the deeply quenched supercooled states. The density and the range of interaction are chosen so that the instantaneously barely isolated centers are present. We analyze the microscopic structural origin of the features in the instantaneous-normal-mode (INM) spectrum and search for evidence of state transformation. It is found that the presence of drastic changes in the INM spectra upon entering the deep supercooled regime is accompanied by the reduction in the spatial connectivity. We develop a method to characterize the spatial configuration ration in an attempt to address the origin of the temperature-dependent changes in the spectra. (C) 2000 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0378-4371(00)00045-5
http://hdl.handle.net/11536/30459
ISSN: 0378-4371
DOI: 10.1016/S0378-4371(00)00045-5
期刊: PHYSICA A
Volume: 281
Issue: 1-4
起始頁: 393
結束頁: 403
顯示於類別:會議論文


文件中的檔案:

  1. 000087741700038.pdf