Interfacial Superconductivity Achieved in Parent AEFe 2 As 2 (AE = Ca, Sr, Ba) by a Simple and Realistic Annealing Route
Interfacial Superconductivity Achieved in Parent AEFe 2 As 2 (AE = Ca, Sr, Ba) by a Simple and Realistic Annealing Route
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通过简单而现实的退火路线在母体 AEFe 2 As 2 (AE = Ca, Sr, Ba) 中实现界面超导
DOI：
10.1021/acs.nanolett.0c04995
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发表时间：
2021
期刊：
影响因子：
10.8
通讯作者：
Liu, Rui-Zhe
中科院分区：
文献类型：
--
作者：
Huyan, Shuyuan;Lyu, Yanfeng;Wang, Hua;Deng, Liangzi;Wu, Zheng;Lv, Bing;Zhao, Kui;Tian, Fei;Gao, Guanhui;Liu, Rui-Zhe
具有界面的材料通常表现出丰富的物理学所例示的非凡现象，例如高温超导性和增强的电子关联。然而，到目前为止，受限界面的演示涉及大量的努力和偶然性，并且没有简单的路径是一致可用的。本文报道了非超导母体化合物AEFe_2As_2（AE = Ca，Sr，Ba）在As，P，Sb气氛中通过简单的后续退火获得的界面超导电性。我们的结果表明，超导电性起源于混合货车德瓦尔斯异质结构界面处的电子转移，与观察到的二维超导转变一致。这些观测结果表明，AEFe2As2化合物家族中先前报道的非体超导性的界面的共同起源，并为进一步探索界面超导性提供了见解。
Materials with interfaces often exhibit extraordinary phenomena exemplified by rich physics, such as high-temperature superconductivity and enhanced electronic correlations. However, demonstrations of confined interfaces to date have involved intensive effort and fortuity, and no simple path is consistently available. Here, we report the achievement of interfacial superconductivity in the nonsuperconducting parent compounds AEFe2As2, where AE = Ca, Sr, or Ba, by simple subsequent annealing of the as-grown samples in an atmosphere of As, P, or Sb. Our results indicate that the superconductivity originates from electron transfer at the interface of the hybrid van der Waals heterostructures, consistent with the two-dimensional superconducting transition observed. The observations suggest a common origin of interfaces for the nonbulk superconductivity previously reported in the AEFe2As2compound family and provide insight for the further exploration of interfacial superconductivity.