论文标题
在LAALO3/KTAO3（110）异源面上观察二维超导性
Observation of two-dimensional superconductivity at the LaAlO3/KTaO3(110) heterointerface
论文作者
论文摘要
我们报告了在Laalo3膜和5D过渡金属氧化物KTAO3（110）单晶之间的界面上观察到TC〜0.9 K超导性的观察。该界面显示上临界场的大型各向异性，其超导过渡与Berezinskii-Kosterlitz-无尽的过渡一致。这两个事实都表明，超导性本质上是二维（2D）。在5 K处测得的载体密度为〜7次10^13 cm-2。超导层厚度和相干长度估计分别为〜8和〜30 nm。我们的结果为研究氧化物界面的2D超导性研究提供了一个新的平台。
We report on the observation of a Tc ~0.9 K superconductivity at the interface between LaAlO3 film and the 5d transition-metal oxide KTaO3(110) single crystal. The interface shows a large anisotropy of the upper critical field, and its superconducting transition is consistent with a Berezinskii-Kosterlitz-Thouless transition. Both facts suggest that the superconductivity is two-dimensional (2D) in nature. The carrier density measured at 5 K is ~7 time 10^13 cm-2. The superconducting layer thickness and coherence length are estimated to be ~8 and ~30 nm, respectively. Our result provides a new platform for the study of 2D superconductivity at oxide interfaces.
