论文标题
Laalo3/KTAO3（111）异质结构中超导性的表面电荷写入和非易失性控制
Surface charge writing and non-volatile control of superconductivity in LaAlO3/KTaO3(111) heterostructure
论文作者
论文摘要
LAALO3和KTAO3（111）之间的氧化物界面可以容纳一种电子气体，该电子气体在低温下凝结成超导性。在这项工作中，我们使用有偏见的导电原子力显微镜尖端证明了该电子气体的局部和非挥发性控制。通过扫描尖端，可以在Laalo3的表面积聚电荷，随后将埋入的Laalo3/KTAO3（111）界面传导很大程度上，从导电（超导）到绝缘状态都有不同。调整效果在室温下稳定> 20小时。载体密度的最大调制> 8倍10^13/cm^2。该结果表明了一个新的模型系统，其中可重写的超导，正常和绝缘状态可以按需在相同的材料中灵活定义。
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.
