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Title: Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO 3 and a water-dissolvable overlayer
Authors: Han, Kun
Hu, Kaige
Li, Xiao
Huang, Ke
Huang, Zhen
Zeng, Shengwei
Qi, Dongchen
Ye, Chen
Yang, Jian
Xu, Huan
Ariando, Ariando
Yi, Jiabao
Lü, Weiming
Yan, Shishen
Wang, Xiao Renshaw
Keywords: Electron Gas
Water-dissolvable Overlayer
Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Han, K., Hu, K., Li, X., Huang, K., Huang, Z., Zeng, S., . . . Wang, X. R. (2019). Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO3 and a water-dissolvable overlayer. Science Advances, 5(8), eaaw7286-. doi:10.1126/sciadv.aaw7286
Series/Report no.: Science Advances
Abstract: While benefiting greatly from electronics, our society also faces a major problem of electronic waste, which has already caused environmental pollution and adverse human health effects. Therefore, recyclability becomes a must-have feature in future electronics. Here, we demonstrate an erasable and recreatable two-dimensional electron gas (2DEG), which can be easily created and patterned by depositing a water-dissolvable overlayer of amorphous Sr3Al2O6 (a-SAO) on SrTiO3 (STO) at room temperature. The 2DEG can be repeatedly erased or recreated by depositing the a-SAO or dissolving in water, respectively. Photoluminescence results show that the 2DEG arises from the a-SAO–induced oxygen vacancy. Furthermore, by gradually depleting the 2DEG, a transition of nonlinear to linear Hall effect is observed, demonstrating an unexpected interfacial band structure. The convenience and repeatability in the creation of the water-dissolvable 2DEG with rich physics could potentially contribute to the exploration of next generation electronics, such as environment-friendly or water-soluble electronics.
DOI: 10.1126/sciadv.aaw7286
Rights: © 2019 The Author(s), some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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