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题名:
Structural and optical properties of Ge60Te40: experimental and theoretical verification
作者: Yi, XY; Wang, ZY; Dong, F; Cheng, S; Wang, J; Liu, CC; Li, J; Wang, SY; Yang, TY; Su, WS; Chen, LY
刊名: JOURNAL OF PHYSICS D-APPLIED PHYSICS
出版日期: 2016
卷号: 49, 期号:15, 页码:
关键词: TOTAL-ENERGY CALCULATIONS ; DOPED GE2SB2TE5 FILMS ; X-RAY PHOTOEMISSION ; WAVE BASIS-SET ; ELECTRONIC-STRUCTURE ; THIN-FILMS ; GETE ; DYNAMICS ; ORDER ; STABILITY
DOI: 10.1088/0022-3727/49/15/155105
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.
文章类型: 期刊文献
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000373620600008
ISSN号: 0022-3727
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25840
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2016-01-01,49(15):—.
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