A termination-insensitive and robust electron gas at the heterointerface of two complex oxides
Abstract
The single-crystal SrTiO3 (001) has two different surface terminations, TiO2 and SrO. One most remarkable observation in previous studies is that only the heterointerfaces with TiO2-terminated SrTiO3, which usually combines with polar oxides such as LaAlO3, host an electron gas. Here we show that a robust electron gas can be generated between a non-polar oxide, CaHfO3, and SrTiO3 (001) with either termination. Unlike the well-known electron gas of LaAlO3/SrTiO3, the present one of CaHfO3/SrTiO3 essentially has no critical thickness of CaHfO3, can survive a long-time oxygen annealing at high temperature, and its transport properties are stable under exposure to water and other polar solvents. By electrostatic gating through CaHfO3, field-effect devices are demonstrated using CaHfO3/SrTiO3 heterointerfaces with both terminations. These results show that the electron gas reported in the present study is unique and promising for applications in oxide electronics.
- Authors:
-
[1];
[1];
[3]
- Zhejiang Univ., Hangzhou (China)
- Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Zhejiang Univ., Hangzhou (China); Nanjing Univ. (China)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Ministry of Science and Technology of China (MOST)
- OSTI Identifier:
- 1597947
- Grant/Contract Number:
- AC02-76SF00515; 2016YFA0300204; 2017YFA0303002
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Condensed-matter physics; Electronic devices; Electronics, photonics and device physics; Materials science
Citation Formats
Zhang, Meng, Du, Kai, Ren, Tianshuang, Tian, He, Zhang, Ze, Hwang, Harold Y., and Xie, Yanwu. A termination-insensitive and robust electron gas at the heterointerface of two complex oxides. United States: N. p., 2019.
Web. doi:10.1038/s41467-019-12036-5.
Zhang, Meng, Du, Kai, Ren, Tianshuang, Tian, He, Zhang, Ze, Hwang, Harold Y., & Xie, Yanwu. A termination-insensitive and robust electron gas at the heterointerface of two complex oxides. United States. https://doi.org/10.1038/s41467-019-12036-5
Zhang, Meng, Du, Kai, Ren, Tianshuang, Tian, He, Zhang, Ze, Hwang, Harold Y., and Xie, Yanwu. Fri .
"A termination-insensitive and robust electron gas at the heterointerface of two complex oxides". United States. https://doi.org/10.1038/s41467-019-12036-5. https://www.osti.gov/servlets/purl/1597947.
@article{osti_1597947,
title = {A termination-insensitive and robust electron gas at the heterointerface of two complex oxides},
author = {Zhang, Meng and Du, Kai and Ren, Tianshuang and Tian, He and Zhang, Ze and Hwang, Harold Y. and Xie, Yanwu},
abstractNote = {The single-crystal SrTiO3 (001) has two different surface terminations, TiO2 and SrO. One most remarkable observation in previous studies is that only the heterointerfaces with TiO2-terminated SrTiO3, which usually combines with polar oxides such as LaAlO3, host an electron gas. Here we show that a robust electron gas can be generated between a non-polar oxide, CaHfO3, and SrTiO3 (001) with either termination. Unlike the well-known electron gas of LaAlO3/SrTiO3, the present one of CaHfO3/SrTiO3 essentially has no critical thickness of CaHfO3, can survive a long-time oxygen annealing at high temperature, and its transport properties are stable under exposure to water and other polar solvents. By electrostatic gating through CaHfO3, field-effect devices are demonstrated using CaHfO3/SrTiO3 heterointerfaces with both terminations. These results show that the electron gas reported in the present study is unique and promising for applications in oxide electronics.},
doi = {10.1038/s41467-019-12036-5},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {9}
}
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Works referencing / citing this record:
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