DOI: 10.1016/j.scib.2020.10.006
论文题名: Observation of robust edge superconductivity in Fe(Se,Te) under strong magnetic perturbation
作者: Jiang D. ; Pan Y. ; Wang S. ; Lin Y. ; Holland C.M. ; Kirtley J.R. ; Chen X. ; Zhao J. ; Chen L. ; Yin S. ; Wang Y.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期: 5 起始页码: 425
结束页码: 432
语种: 英语
中文关键词: Anti-ferromagnetic spin correlation
; Edge superconductivity
; Iron-chalcogenide superconductors
; Magnetic perturbation
; Scanning SQUID microscopy
英文关键词: Diamagnetism
; High temperature superconductors
; Quantum computers
; Quantum interference devices
; SQUIDs
; Topology
; Bulk superconductivity
; Complex magnetic ordering
; Current distribution
; Device application
; Diamagnetic susceptibility
; Magnetic penetration depth
; Magnetic perturbation
; Temperature dependence
; Temperature distribution
英文摘要: The iron-chalcogenide high temperature superconductor Fe(Se,Te) (FST) has been reported to exhibit complex magnetic ordering and nontrivial band topology which may lead to novel superconducting phenomena. However, the recent studies have so far been largely concentrated on its band and spin structures while its mesoscopic electronic and magnetic response, crucial for future device applications, has not been explored experimentally. Here, we used scanning superconducting quantum interference device microscopy for its sensitivity to both local diamagnetic susceptibility and current distribution in order to image the superfluid density and supercurrent in FST. We found that in FST with 10% interstitial Fe, whose magnetic structure was heavily disrupted, bulk superconductivity was significantly suppressed whereas edge still preserved strong superconducting diamagnetism. The edge dominantly carried supercurrent despite of a very long magnetic penetration depth. The temperature dependences of the superfluid density and supercurrent distribution were distinctively different between the edge and the bulk. Our Heisenberg modeling showed that magnetic dopants stabilize anti-ferromagnetic spin correlation along the edge, which may contribute towards its robust superconductivity. Our observations hold implication for FST as potential platforms for topological quantum computation and superconducting spintronics. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170289
Appears in Collections: 气候变化与战略
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作者单位: Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China; Department of Physics, Stanford University, Stanford, CA 94305, United States; Department of Physics, University of Science and Technology of China, Hefei, 230026, China; Institute for Theoretical Physics and Cosmology, Zhejiang University of Technology, Hangzhou, 310023, China; Shanghai Research Center for Quantum Sciences, Shanghai, 201315, China
Recommended Citation:
Jiang D.,Pan Y.,Wang S.,et al. Observation of robust edge superconductivity in Fe(Se,Te) under strong magnetic perturbation[J]. Science Bulletin,2021-01-01,66(5)