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Open AccessArticle

Resistance Switching Behavior in Rectangle-Nano-Pattern SrTiO3 Induced by Simple Annealing

1
School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
2
Department of Physics, and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen University, Xiamen 361005, China
3
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
4
Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
5
College of Materials, Xiamen University, Xiamen 361005, China
6
Institute of Artificial Intelligence, Xiamen University Malaysia, Sepang 43900, Malaysia
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(22), 3698; https://doi.org/10.3390/ma12223698
Received: 25 September 2019 / Revised: 31 October 2019 / Accepted: 5 November 2019 / Published: 9 November 2019
The tunability of semi-conductivity in SrTiO3 single crystal substrates has been realized by a simple encapsulated annealing method under argon atmosphere. This high temperature annealing-induced property changes are characterized by the transmission spectra, scanning electron microscopy (SEM) and synchrotron-based X-ray absorption (XAS). We find the optical property is strongly influenced by the annealing time (with significant decrease of transmittance). A sub gap absorption at ~427 nm is detected which is attributed to the introduction of oxygen vacancy. Interestingly, in the SEM images, annealing-induced regularly rectangle nano-patterns are directly observed which is contributed to the conducting filaments. The XAS of O K-edge spectra shows the changes of electronic structure by annealing. Very importantly, resistance switching response is displayed in the annealed SrTiO3 single crystal. This suggests a possible simplified route to tune the conductivity of SrTiO3 and further develop novel resistance switching materials. View Full-Text
Keywords: resistance switch; strontium titanium oxide; oxygen vacancy; annealing; rectangle-nano-pattern resistance switch; strontium titanium oxide; oxygen vacancy; annealing; rectangle-nano-pattern
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MDPI and ACS Style

Liao, X.; Zhang, Y.; Wang, J.; Kang, J.; Zhang, J.; Wang, J.; Zheng, J.; Wang, H. Resistance Switching Behavior in Rectangle-Nano-Pattern SrTiO3 Induced by Simple Annealing. Materials 2019, 12, 3698.

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