Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO and a water-dissolvable overlayer.

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ID: 19609
2019
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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 SrAlO (-SAO) on SrTiO (STO) at room temperature. The 2DEG can be repeatedly erased or recreated by depositing the -SAO or dissolving in water, respectively. Photoluminescence results show that the 2DEG arises from the -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.
Reference Key
han2019erasablescience Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
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, X Renshaw;
Journal Science advances
Year 2019
DOI
10.1126/sciadv.aaw7286
URL
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