Tunable metal-insulator transition in Nd1-xYxNiO3 (x=0.3, 0.4) perovskites thin film at near room temperature
Shao, T; Qi, ZM; Wang, YY; Li, YY; Yang, M; Wang, Y; Zhang, GB; Liu, M; Qi, ZM (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China.
2015
发表期刊APPLIED PHYSICS LETTERS
ISSN0003-6951
卷号107期号:2页码:
文章类型期刊文献
摘要Metal-insulator transition (MIT) occurs due to the charge disproportionation and lattice distortions in rare-earth nickelates. Existing studies revealed that the MIT behavior of rare-earth nickelates is fairly sensitive to external stress/pressure, suggesting a viable route for MIT strain engineering. Unlike applying extrinsic strain, the MIT can also be modulated by through rare-earth cation mixing, which can be viewed as intrinsic quantum stress. We choose Nd1-xYxNiO3 (x = 0.3, 0.4) perovskites thin films as a prototype system to exhibit the tunable sharp MIT at near room temperature. By adjusting Y concentration, the transition temperature of the thin films can be changed within the range of 340-360 K. X-ray diffraction, X-ray absorption tine structure (XAFS), and in situ infrared spectroscopy are employed to probe the structural and optical property variation affected by composition and temperature. The infrared transmission intensity decreases with temperature across the MIT, indicating a pronounced thermochromic effect. Meanwhile, the XAFS result exhibits that the crystal atomistic structure changes accompanying with the Y atoms incorporation and MIT phase transition. The heavily doped Y atoms result in the pre-edge peak descent and Ni-O bond elongation, suggesting an enhanced charge disproportionation effect and the weakening of hybridization between Ni-3d and O-2p orbits. (C) 2015 AIP Publishing LLC.
关键词Ray-absorption Spectroscopy Rnio3 Perovskites Local-structure
语种英语
WOS记录号WOS:000358530300012
引用统计
被引频次:1[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/331007/25087
专题中科院上海应用物理研究所2011-2018年
通讯作者Qi, ZM (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China.
推荐引用方式
GB/T 7714
Shao, T,Qi, ZM,Wang, YY,et al. Tunable metal-insulator transition in Nd1-xYxNiO3 (x=0.3, 0.4) perovskites thin film at near room temperature[J]. APPLIED PHYSICS LETTERS,2015,107(2):—.
APA Shao, T.,Qi, ZM.,Wang, YY.,Li, YY.,Yang, M.,...&Qi, ZM .(2015).Tunable metal-insulator transition in Nd1-xYxNiO3 (x=0.3, 0.4) perovskites thin film at near room temperature.APPLIED PHYSICS LETTERS,107(2),—.
MLA Shao, T,et al."Tunable metal-insulator transition in Nd1-xYxNiO3 (x=0.3, 0.4) perovskites thin film at near room temperature".APPLIED PHYSICS LETTERS 107.2(2015):—.
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