超导电性
凝聚态物理
库珀对
配对
电荷密度波
单层
铜酸盐
高温超导
态密度
密度波理论
扫描隧道显微镜
量子隧道
材料科学
物理
纳米技术
作者
Yanzhao Liu,Tianheng Wei,Guanyang He,Y. Zhang,Ziqiang Wang,Jian Wang
出处
期刊:Nature
[Springer Nature]
日期:2023-06-28
卷期号:618 (7967): 934-939
标识
DOI:10.1038/s41586-023-06072-x
摘要
The pair density wave (PDW) is an extraordinary superconducting state in which Cooper pairs carry non-zero momentum1,2. Evidence for the existence of intrinsic PDW order in high-temperature (high-Tc) cuprate superconductors3,4 and kagome superconductors5 has emerged recently. However, the PDW order in iron-based high-Tc superconductors has not been observed experimentally. Here, using scanning tunnelling microscopy and spectroscopy, we report the discovery of the PDW state in monolayer iron-based high-Tc Fe(Te,Se) films grown on SrTiO3(001) substrates. The PDW state with a period of λ ≈ 3.6aFe (aFe is the distance between neighbouring Fe atoms) is observed at the domain walls by the spatial electronic modulations of the local density of states, the superconducting gap and the π-phase shift boundaries of the PDW around the vortices of the intertwined charge density wave order. The discovery of the PDW state in the monolayer Fe(Te,Se) film provides a low-dimensional platform to study the interplay between the correlated electronic states and unconventional Cooper pairing in high-Tc superconductors.
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