Two-dimensional electron gas in the KNbO3:Y ultrathin film
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- 作者：Yanqing Shen (1) (2)
Wenhan Wang (1)
Zhongxiang Zhou (1)
Yongyuan Jiang (1)
Chunfeng Hou (1)
Weidong Fei (2) - 刊名：Journal of Materials Science
- 出版年：2015
- 出版时间：January 2015
- 年：2015
- 卷：50
- 期：1
- 页码：74-78
- 全文大小：1,123 KB
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Wenhan Wang (1)
Zhongxiang Zhou (1)
Yongyuan Jiang (1)
Chunfeng Hou (1)
Weidong Fei (2)
1. Department of Physics, Harbin Institute of Technology, Harbin, 150001, People鈥檚 Republic of China
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People鈥檚 Republic of China - ISSN：1573-4803
文摘
First-principles calculations are used to study KNbO3:Y ultrathin film. The conducting two-dimensional electron gas (2DEG) is found in KNbO3:Y film, whereas SrTiO3:Y superlattice is insulating [Science 331, 886 (2011)]. The carrier density of 2DEG of KNbO3:Y film is twice that of LaTiO3/SrTiO3 superlattice, which is in agreement with the theoretical results of KNbO3:La superlattice. It is found that the charge densities of different monolayers are modulated by the polarization effect of KNbO3. We predict that 2DEG may be in other rare-earth atoms-doped KNbO3 film.