LaAlO3/KTaO3(110) 异质界面处二维超导的观测
超导电性
2021-05-17 v1
摘要
我们报道了在 LaAlO3 薄膜与 5d 过渡金属氧化物 KTaO3(110) 单晶的界面处观测到 Tc ~0.9 K 的超导性。该界面显示出很大的上限临界场各向异性，其超导转变符合 Berezinskii-Kosterlitz-Thouless 转变。这两个事实表明该超导本质上是二维（2D）的。在 5 K 下测得的载流子密度约为 7×10^13 cm^-2。超导层厚度和相干长度分别估计约为 8 和 ~30 nm。我们的结果为氧化物界面处二维超导的研究提供了新平台。
引用
@article{arxiv.2011.08526,
title = {Observation of two-dimensional superconductivity at the LaAlO3/KTaO3(110) heterointerface},
author = {Zheng Chen and Zhongran Liu and Yanqiu Sun and Xiaoxin Chen and Yuan Liu and Hui Zhang and Hekang Li and Meng Zhang and Siyuan Hong and Tianshuang Ren and Chao Zhang and He Tian and Yi Zhou and Jirong Sun and Yanwu Xie},
journal= {arXiv preprint arXiv:2011.08526},
year = {2021}
}
备注
10 pages, 4 figures for main text; plus 6 pages, 8 figures for supplemental materials