超晶格
分子束外延
超导电性
材料科学
凝聚态物理
原子单位
亚稳态
反铁磁性
外延
电子结构
电子能量损失谱
光谱学
纳米技术
光电子学
物理
图层(电子)
量子力学
透射电子显微镜
作者
Nicolas Bonmassar,G. Christiani,Ute Salzberger,Yi Wang,Г. Логвенов,Y. Eren Suyolcu,Peter A. van Aken
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-06-01
卷期号:17 (12): 11521-11526
被引量:5
标识
DOI:10.1021/acsnano.3c01422
摘要
We present a study on the properties of superlattices made of ultrathin Sr2CuO4-δ layers sandwiched between La2CuO4 layers beyond the antiferromagnetic insulating nature of the individual layers of choice. Using molecular beam epitaxy, we synthesized these superlattices and observed superconductivity and metallicity at the interfaces. We probed the hole distribution to determine the discernible quantum states and found that the high-quality epitaxy, combined with mapping the electronic fine structure by electron energy-loss spectroscopy, allowed for the differentiation of insulating, metallic, and superconducting layers at the atomic-column scale. Our results demonstrate the possibility of exploring specific electronic properties at the subnanometer scale and highlight the potential of utilizing metastable Sr2CuO4-δ slabs.
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