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Redox Controllable Switch of Crystalline Phase and Physical Property in SrVOx Epitaxial Films
Xue-jiao Gu1, Zhen-lin Luo*1, Yong-qi Dong1, Jing-tian Zhou1, Han Xu1, Bin Hong2, Chen Gao*1,3
1.National Synchrotron Radiation Laboratory & CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, China;2.Hefei Innovation Research Institute, School of Microelectronics, Beihang University, Hefei 230013, China;3.Beijing Advanced Sciences and Innovation center, Chinese Academy of Sciences, Beijing 100029, China
Abstract:
Transition-metal oxides have attracted much attention due to its abundant crystalline phases and intriguing physical properties. However, some of these compounds are difficult to be fabricated directly in film form due to the ease of valence variation of transition-metal elements. In this work, we reveal the reversible structural transition between SrVO3 and Sr2V2O7 films via thermal treatment in oxygen atmosphere or in vacuum. Based on this, Sr2V2O7 epitaxial films are successfully synthesized and studied. Property characterizations show that the semitransparent and metallic SrVO3 could reversibly switch into transparent and insulating Sr2V2O7, implying potential applications in controllable electronic and optical devices.
Key words:  Transition-metal oxides, Reversible transition, Controllable electronic and optical devices
FundProject:
氧化还原对SrVOx外延膜晶相及物性的可逆调控
古雪姣1, 罗震林*1, 董永齐1, 周靖添1, 徐 晗1, 洪 宾2, 高 琛*1,3
1.中国科学技术大学国家同步辐射实验室,中国科学院能量转换材料重点实验室,合肥 230026;2.北京航空航天大学微电子学院合肥创新研究中心,合肥 230013;3.中国科学院北京高等科学与创新中心,北京 101407
摘要:
本文揭示了SrVO3和Sr2V2O7薄膜通过氧气或真空气氛中热处理来相互转化的现象. 基于该现象,高质量的Sr2V2O7外延薄膜被间接合成. 性能表征结果显示半透明金属性的SrVO3与透明绝缘的Sr2V2O7可以实现可逆转换,该现象在可控的电学、光学器件中具有潜在应用价值.
关键词:  过渡金属氧化物,可逆转变,可控的电子和光学器件
DOI:10.1063/1674-0068/cjcp1903039
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