Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 126, Issue 1, Pages 611-616Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.1c08232
Keywords
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Funding
- National Natural Science Foundation of China [51572222]
- Key Research Project of the Natural Science Foundation of Shaanxi Province, China [2021JZ-08, 2020JM-088]
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The coexistence of metallicity and ferroelectricity-like polarization is reported at GdAlO3/SrTiO3 heterointerfaces, where the transport property can be significantly manipulated by switching the polarization state. The switchable conductance improves under the influence of a polarization state at 6 V, accelerating the commercial application of oxide devices.
Application of multifunctional integrated devices represents a main trend in the future. However, it is still a great challenge to realize ferroelectric metals in a single system. Here, we report the coexistence of metallicity and ferroelectricity-like polarization at GdAlO3/SrTiO3 heterointerfaces. The results show that the asymmetric bistable polarization in the GdAIO 3 film is attributed to the spontaneous polarization of oxygen vacancies. Furthermore, the transport property of GdAlO3/SrTiO3 heterointerfaces can be significantly manipulated by switching the polarization state. It is observed that the switchable conductance significantly improves under the influence of a polarization state at 6 V. Its change in the resistance is about 17.2% under 10 V, which accelerates the commercial application of oxide devices.
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