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Redox controllable switch of crystalline phase and physical property in SrVOx epitaxial films
Chen Gao
Author NameAffiliationE-mail
Chen Gao National Synchrotron Radiation Laboratory & CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, China cgao@ustc.edu.cn 
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 invertible structural transition between SrVO3 and Sr2V2O7 films via thermal treatment in oxygen atmosphere or in vacuum. Based on this, novel Sr2V2O7 epitaxial films were successfully synthesized and studied. Property characterization show that the semitransparent and metallic SrVO3 could reversibly switched into transparent and insulating Sr2V2O7, implying potential applications in controllable electronic and optical devices.
Key words:  Transition-metal oxides, invertible transition, controllable electronic and optical devices
FundProject:
氧化还原氛围对SrVOx 外延膜晶相及物理性质的可逆控制
高琛
摘要:
过渡金属氧化物因为它多样的晶相以及有趣的性质而引起人们广泛的关注。然而,由于过渡金属元素有多种化合价且容易改变,使得有些化合物难以直接制备成薄膜。在这项工作中,我们揭示了SrVO3和Sr2V2O7薄膜在氧气或者真空气氛中通过热处理而相互转化的现象。基于这一转化,Sr2V2O7外延薄膜也被间接合成。在对两者的性能表征中,半透明金属性的SrVO3与透明绝缘性的Sr2V2O7能实现可逆转化,使得它们在可控电子光学器件中具有潜在的应用前景。
关键词:  过渡金属氧化物,可逆转化,可控电子光学器件
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