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Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO3 and a water-dissolvable overlayer.


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.

SUBMITTER: Han K 

PROVIDER: S-EPMC6697431 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO<sub>3</sub> and a water-dissolvable overlayer.

Han Kun K   Hu Kaige K   Li Xiao X   Huang Ke K   Huang Zhen Z   Zeng Shengwei S   Qi Dongchen D   Ye Chen C   Yang Jian J   Xu Huan H   Ariando Ariando A   Yi Jiabao J   Lü Weiming W   Yan Shishen S   Wang X Renshaw XR  

Science advances 20190816 8


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 Sr<sub>3</sub>Al<sub>2</sub>O<sub>6</sub> (<i>a</i>-S  ...[more]

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