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dc.contributor.authorSun, Zhimeizh_CN
dc.contributor.authorZhou, Jianzh_CN
dc.contributor.authorBlomqvist, Andreaszh_CN
dc.contributor.authorXu, Lihuazh_CN
dc.contributor.authorAhuja, Rajeevzh_CN
dc.contributor.author孙志梅zh_CN
dc.contributor.author周健zh_CN
dc.date.accessioned2015-07-22T01:36:55Z
dc.date.available2015-07-22T01:36:55Z
dc.date.issued2008-05-21zh_CN
dc.identifier.citationJOURNAL OF PHYSICS-CONDENSED MATTER, 2008,20(20)zh_CN
dc.identifier.otherWOS:000255661500057zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/85104
dc.descriptionConference Name:11th International Conference on Magnetic Fluids. Conference Address: Kosice, SLOVAKIA. Time:JUL 23-27, 2007.zh_CN
dc.description.abstractPhase-change materials based on chalcogenide alloys have been widely used for optical data storage and are promising materials for nonvolatile electrical memory use. However, the mechanism behind the utilization is unclear as yet. Since the rewritable data storage involved an extremely fast laser melt-quenched process for chalcogenide alloys, the liquid structure of which is one key to investigating the mechanism of the fast reversible phase transition and hence rewritable data storage, here by means of ab initio molecular dynamics we have studied the local structure of liquid Ge(1)Sb(2)Te(4). The results show that the liquid structure gives a picture of most Sb atoms being octahedrally coordinated, and the coexistence of tetrahedral and fivefold coordination at octahedral sites for Ge atoms, while Te atoms are essentially fourfold and threefold coordinated at octahedral sites, as characterized by partial pair correlation functions and bond angle distributions. The local structure of liquid Ge(1)Sb(2)Te(4) generally resembles that of the crystalline form, except for the much lower coordination number. It may be this unique liquid structure that results in the fast and reversible phase transition between crystalline and amorphous states.zh_CN
dc.language.isoen_USzh_CN
dc.publisherJ PHYS-CONDENS MATzh_CN
dc.source.urihttp://dx.doi.org/10.1088/0953-8984/20/20/205102zh_CN
dc.subjectPHASE-CHANGE MATERIALSzh_CN
dc.subjectMOLECULAR-DYNAMICSzh_CN
dc.subjectMEMORYzh_CN
dc.titleLocal structure of liquid Ge(1)Sb(2)Te(4) for rewritable data storage usezh_CN
dc.typeConferencezh_CN


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