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Personal information
教授 博士生导师
所在单位:集成电路学院
学历:研究生(博士)毕业
学位:工学博士学位
毕业院校:华中科技大学
学科:微电子学与固体电子学曾获荣誉:
2024 华中科技大学青年五四奖章
2022 华为奥林帕斯先锋奖
2020 湖北省技术发明一等奖(排名第2)
2013 湖北省年度“十大科技事件”
2013 湖北省优秀博士学位论文
2014 湖北省优秀学士学位论文指导教师
2015 华中科技大学教师教学竞赛二等奖
2017 华中科技大学光学与电子信息学院“我最喜爱的教师班主任“
2020 华中科技大学光学与电子信息学院突出贡献一等奖
论文类型:期刊论文
第一作者:马平
通讯作者:缪向水
合写作者:孙成军,程晓敏,余念念,徐明,黄婷,童浩
发表刊物:JOURNAL OF PHYSICAL CHEMISTRY C
所属单位:华中科技大学
学科门类:工学
一级学科:电子科学与技术
文献类型:J
卷号:121
期号:7
页面范围:1122-1128
关键字:Binding-energy Shifts;Phase-change;Carbon Nanotube;Crystallization;Ge2Sb2Te5;States;Edge;Coordination;Media;Gap
DOI码:10.1021/acs.jpcc.6b09841
发表时间:4275-04-01
摘要:Phase-change materials, the highly promising candidate for nonvolatile data recording, present a different phase-change property when film thickness shrinks to very deep submicron scale. The local structure of amorphous GeTe ultrathin films, which contributes to the characteristics of phase change, is examined using X-ray absorption measurements. Ge atoms are found to be low-coordinated when the film thickness decreases. Ge atoms are linked to neighbor atoms by covalent bond, and the weaker Ge-Te bonds are more easily broken, which suggests that Ge atoms are located in the defective Ge2Te3 local arrangement. The mixture of se(3)/sp(2) hybridization and 3-coordinated Ge found in ab initio molecular dynamics simulations also supports this local motif. The exponential rise of crystallization temperatures of ultrathin films with decreasing film thickness, which is a vital parameter for phase change process, can be well explained by the proposed defective GeTe local arrangement.
发布期刊链接:https://pubs.acs.org/doi/full/10.1021/acs.jpcc.6b09841