Structural and optical properties of Ge60Te40: experimental and theoretical verification
Yi, XY; Wang, ZY; Dong, F; Cheng, S; Wang, J; Liu, CC; Li, J; Wang, SY; Yang, TY; Su, WS; Chen, LY; Li, J (reprint author), Fudan Univ, Dept Opt Sci & Engn, Shanghai Ultra Precis Opt Mfg Engn Ctr, Shanghai 200433, Peoples R China.; Li, J (reprint author), Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China.; Su, WS (reprint author), Natl Ctr High Performance Comp, Hsinchu 30076, Taiwan.; Su, WS (reprint author), Natl Chung Hsing Univ, Dept Phys, Taichung 40227, Taiwan.
2016
发表期刊JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN0022-3727
卷号49期号:15页码:
文章类型期刊文献
摘要The temperature-dependent structural and optical properties of Ge60Te40 during transformation from amorphous to crystalline phases are studied by spectroscopic ellipsometry, grazing incidence x-ray diffraction (GIXRD), x-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM) as well as ab initio molecular dynamics (MD) simulations. Our findings, derived from GIXRD results and dielectric functions, indicate that the crystallization process of Ge60Te40 occurs at similar to 260 degrees C and the crystalline phase adopts the rhombohedral GeTe phase along with the cubic Ge phase. Our calculations further indicate that the Ge atoms also prefer to clump together in amorphous Ge60Te40. Such a segregation of Ge leads to a high-temperature phase-change in Ge60Te40 samples. According to the XPS results, the local atomic environment between amorphous and crystalline states gets a little bit of change. And the result of the atomic cluster alignment suggests that both the amorphous and crystalline phases have the rhombohedral local structure.
关键词Total-energy Calculations Doped Ge2sb2te5 Films X-ray Photoemission Wave Basis-set Electronic-structure Thin-films Gete Dynamics Order Stability
DOI10.1088/0022-3727/49/15/155105
收录类别SCI
语种英语
WOS记录号WOS:000373620600008
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25840
专题中科院上海应用物理研究所2011-2018年
通讯作者Li, J (reprint author), Fudan Univ, Dept Opt Sci & Engn, Shanghai Ultra Precis Opt Mfg Engn Ctr, Shanghai 200433, Peoples R China.; Li, J (reprint author), Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China.; Su, WS (reprint author), Natl Ctr High Performance Comp, Hsinchu 30076, Taiwan.; Su, WS (reprint author), Natl Chung Hsing Univ, Dept Phys, Taichung 40227, Taiwan.
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Yi, XY,Wang, ZY,Dong, F,et al. Structural and optical properties of Ge60Te40: experimental and theoretical verification[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2016,49(15):—.
APA Yi, XY.,Wang, ZY.,Dong, F.,Cheng, S.,Wang, J.,...&Su, WS .(2016).Structural and optical properties of Ge60Te40: experimental and theoretical verification.JOURNAL OF PHYSICS D-APPLIED PHYSICS,49(15),—.
MLA Yi, XY,et al."Structural and optical properties of Ge60Te40: experimental and theoretical verification".JOURNAL OF PHYSICS D-APPLIED PHYSICS 49.15(2016):—.
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