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Author Wang, Liangxin ♦ Zhao, Jiangtao ♦ Hong, Bin ♦ Hu, Kai ♦ Luo, Zhenlin ♦ Yang, Yuanjun ♦ Gao, Chen ♦ Peng, Jinlan ♦ Zhang, Haibin ♦ Wen, Xiaolei ♦ Li, Xiaoguang
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ DEPOSITS ♦ EPITAXY ♦ FERMI LEVEL ♦ FILMS ♦ GRAIN SIZE ♦ MAGNETRONS ♦ MONOCRYSTALS ♦ PEROVSKITE ♦ PHASE TRANSFORMATIONS ♦ RADIOWAVE RADIATION ♦ SPUTTERING ♦ STRAINS ♦ STRONTIUM TITANATES ♦ SUBSTRATES ♦ SUPERLATTICES ♦ TEMPERATURE DEPENDENCE ♦ VANADIUM OXIDES
Abstract Vanadium dioxide (VO{sub 2}) epitaxial films were grown on perovskite single-crystal strontium titanate (SrTiO{sub 3}) substrates by reactive radio-frequency magnetron sputtering. The growth temperature-dependent metal–insulator transition (MIT) behavior of the VO{sub 2} epitaxial films was then investigated. We found that the order of magnitude of resistance change across the MIT increased from 10{sup 2} to 10{sup 4} with increasing growth temperature. In contrast, the temperature of the MIT does not strongly depend on the growth temperature and is fairly stable at about 345 K. On one hand, the increasing magnitude of the MIT is attributed to the better crystallinity and thus larger grain size in the (010)-VO{sub 2}/(111)-SrTiO{sub 3} epitaxial films at elevated temperature. On the other hand, the strain states do not change in the VO{sub 2} films deposited at various temperatures, resulting in stable V-V chains and V-O bonds in the VO{sub 2} epitaxial films. The accompanied orbital occupancy near the Fermi level is also constant and thus the MIT temperatures of VO{sub 2} films deposited at various temperatures are nearly the same. This work demonstrates that high-quality VO{sub 2} can be grown on perovskite substrates, showing potential for integration into oxide heterostructures and superlattices.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-14
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 119
Issue Number 14


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