期刊
NANO LETTERS
卷 11, 期 9, 页码 3774-3778出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl201821j
关键词
Complex oxide films; oxide electronics; heterointerfaces; strontium titanate
类别
资金
- Netherlands Organization for Scientific Research (NWO)
- National Fundamental Research of China [2007CB925002]
- National Natural Science Foundation of China [50832007, 50721001]
The conductance confined at the interface of complex oxide heterostructures provides new opportunities to explore nanoelectronic as well as nanoionic devices. Herein we show that metallic interfaces can be realized in SrTiO3-based heterostructures with various insulating overlayers of amorphous LaAlO3, SrTiO3, and yttria-stabilized zirconia films. On the other hand, samples of amorphous La7/8Sr1/8MnO3 films on SrTiO3 substrates remain insulating. The interfacial conductivity results from the formation of oxygen vacancies near the interface, suggesting that the redox reactions on the surface of SrTiO3 substrates play an important role.
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