Surface charge writing and non-volatile control of superconductivity in LaAlO3/KTaO3(111) heterostructure
| Autor: | Hong, Siyuan, Sun, Yanqiu, Liu, Yuan, Wang, Yishuai, Xie, Yanwu |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev.. Applied 17, L061001 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.17.L061001 |
| Popis: | The oxide interface between LaAlO3 and KTaO3(111) can host an electron gas that condenses into superconductivity at low temperatures. In this work, we demonstrate a local and non-volatile control of this electron gas using a biased conducting atomic force microscope tip. By scanning the tip, charges can be accumulated on the surface of LaAlO3, which subsequently tune the conduction of the buried LaAlO3/KTaO3(111) interface largely, varying from conducting (superconducting) to insulating states. The tuning effects are stable for > 20 h at room temperature. The maximum modulation of carrier density is > 8 times 10^13/cm^2. This result suggests a new model system in which rewritable superconducting, normal, and insulating states can be flexibly defined in the same material on demand. Comment: 13 pages in total. 4 figures in the main text, plus 3 supplementary figures |
| Databáze: | arXiv |
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