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- W2897930852 abstract "Electrolyte gating is a powerful means for tuning the carrier density and exploring the resultant modulation of novel properties on solid surfaces. However, the mechanism, especially its effect on the oxygen migration and electrostatic charging at the oxide heterostructures, is still unclear. Here we explore the electrolyte gating on oxygen-deficient interfaces between ${mathrm{SrTiO}}_{3}$ (STO) crystals and ${mathrm{LaAlO}}_{3}$ (LAO) overlayer through the measurements of electrical transport, x-ray absorption spectroscopy, and photoluminescence spectra. We found that oxygen vacancies (${mathrm{O}}_{mathrm{vac}}$) were filled selectively and irreversibly after gating due to oxygen electromigration at the amorphous LAO/STO interface, resulting in a reconstruction of its interfacial band structure. Because of the filling of ${mathrm{O}}_{mathrm{vac}}$, the amorphous interface also showed an enhanced electron mobility and quantum oscillation of the conductance. Further, the filling effect could be controlled by the degree of the crystallinity of the LAO overlayer by varying the growth temperatures. Our results reveal the different effects induced by electrolyte gating, providing further clues to understand the mechanism of electrolyte gating on buried interfaces and also opening a new avenue for constructing high-mobility oxide interfaces." @default.
- W2897930852 created "2018-10-26" @default.
- W2897930852 creator A5002634340 @default.
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- W2897930852 date "2018-10-05" @default.
- W2897930852 modified "2023-10-18" @default.
- W2897930852 title "Oxygen Electromigration and Energy Band Reconstruction Induced by Electrolyte Field Effect at Oxide Interfaces" @default.
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- W2897930852 doi "https://doi.org/10.1103/physrevlett.121.146802" @default.
- W2897930852 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30339445" @default.
- W2897930852 hasPublicationYear "2018" @default.
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