The tetragonal-like to rutile structural phase transition in epitaxial VO2/TiO2 (001) thick films
Qiu, HB; Yang, MM; Dong, YQ; Xu, H; Hong, B; Gu, YL; Yang, YJ; Zou, CW; Luo, ZL; Gao, C; Gu, YL (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.
2015
发表期刊NEW JOURNAL OF PHYSICS
ISSN1367-2630
卷号17页码:
文章类型期刊文献
摘要A controllable metal-insulator transition (MIT) of VO2 has been highly desired due to its huge potential applications in memory storage, smart windows or optical switching devices. Recently, interfacial strain engineering has been recognized as an effective approach to tuning the MIT of epitaxial VO2 films. However, the strain-involved structural evolution during the MIT process is still not clear, which prevents comprehensively understanding and utilizing interfacial strain engineering in VO2 films. In this work, we have systematically studied the epitaxial VO2 thick films grown on TiO2 (001) single crystal substrate and the structural transition at the boundary of MIT region. By using in situ temperature-dependent high-resolution x-ray diffractions, a tetragonal-like ('T-like') to 'rutile' structural phase transition is identified during the MIT process. The room-temperature crystal phase of epitaxial VO2/TiO2 (001) thick film is clarified to be tetragonal-like, neither strained-rutile phase nor monoclinic phase. The calculated atomic structure of this T-like phase VO2 resembles that of the M1 phase VO2, which has been verified by their similar Raman spectra. More, the crystal lattices of the coexisted phases in the MIT region were revealed in detail. The current findings will not only show some clues on the MIT mechanism study from the structural point of view, but also favor the interface engineering assisted VO2-based devices and applications in the future.
关键词Metal-insulator-transition Vanadium Dioxide Films Tio2(110) Surface Mott Transition Vo2 Temperature Growth
语种英语
WOS记录号WOS:000365892400003
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25077
专题中科院上海应用物理研究所2011-2018年
通讯作者Gu, YL (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.
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Qiu, HB,Yang, MM,Dong, YQ,et al. The tetragonal-like to rutile structural phase transition in epitaxial VO2/TiO2 (001) thick films[J]. NEW JOURNAL OF PHYSICS,2015,17:—.
APA Qiu, HB.,Yang, MM.,Dong, YQ.,Xu, H.,Hong, B.,...&Gu, YL .(2015).The tetragonal-like to rutile structural phase transition in epitaxial VO2/TiO2 (001) thick films.NEW JOURNAL OF PHYSICS,17,—.
MLA Qiu, HB,et al."The tetragonal-like to rutile structural phase transition in epitaxial VO2/TiO2 (001) thick films".NEW JOURNAL OF PHYSICS 17(2015):—.
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