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	Microscopic mechanisms of equilibrium melting of a solid
	Samanta, Amit ; Tuckerman, Mark E. ; Yu, Tang-Qing ; E, Weinan
	2014
关键词	CRYSTAL INSTABILITY COLLOIDAL CRYSTALS STABILITY LIMIT GERM-FORMATION STRING METHOD NUCLEATION ENERGY TEMPERATURE LINDEMANN METALS
英文摘要	The melting of a solid, like other first-order phase transitions, exhibits an intrinsic time-scale disparity: The time spent by the system in metastable states is orders of magnitude longer than the transition times between the states. Using rare-event sampling techniques, we find that melting of representative solids-here, copper and aluminum-occurs via multiple, competing pathways involving the formation and migration of point defects or dislocations. Each path is characterized by multiple barrier-crossing events arising from multiple metastable states within the solid basin. At temperatures approaching superheating, melting becomes a single barrier-crossing process, and at the limit of superheating, the melting mechanism is driven by a vibrational instability. Our findings reveal the importance of nonlocal behavior, suggesting a revision of the perspective of classical nucleation theory.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000344690100035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Multidisciplinary Sciences; SCI(E); PubMed; 13; ARTICLE; asamanta@math.princeton.edu; mark.tuckerman@nyu.edu; weinan@math.princeton.edu; 6210; 729-732; 346
语种	英语
出处	PubMed ; SCI
出版者	science
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/341624]
专题	数学科学学院
推荐引用方式 GB/T 7714	Samanta, Amit,Tuckerman, Mark E.,Yu, Tang-Qing,et al. Microscopic mechanisms of equilibrium melting of a solid. 2014-01-01.

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