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DOI	10.1073/pnas.2017810118
	Signatures of two-dimensional superconductivity emerging within a three-dimensional host superconductor
	Parra C.; Niestemski F.C.; Contryman A.W.; Giraldo-Gallo P.; Geballe T.H.; Fisher I.R.; Manoharan H.C.
发表日期	2021
ISSN	00278424
卷号	118 期号:16
英文摘要	Spatial disorder has been shown to drive two-dimensional (2D) superconductors to an insulating phase through a superconductor-insulator transition (SIT). Numerical calculations predict that with increasing disorder, emergent electronic granularity is expected in these materials-a phenomenon where superconducting (SC) domains on the scale of the material's coherence length are embedded in an insulating matrix and coherently coupled by Josephson tunneling. Here, we present spatially resolved scanning tunneling spectroscopy (STS) measurements of the three-dimensional (3D) superconductor BaPb1−xBixO3 (BPBO), which surprisingly demonstrate three key signatures of emergent electronic granularity, having only been previously conjectured and observed in 2D thin-film systems. These signatures include the observation of emergent SC domains on the scale of the coherence length, finite energy gap over all space, and strong enhancement of spatial anticorrelation between pairing amplitude and gap magnitude as the SIT is approached. These observations are suggestive of 2D SC behavior embedded within a conventional 3D s-wave host, an intriguing but still unexplained interdimensional phenomenon, which has been hinted at by previous experiments in which critical scaling exponents in the vicinity of a putative 3D quantum phase transition are consistent only with dimensionality d = 2. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Phase transitions; Reduced dimensions; Scanning tunneling microscopy; Spectroscopy; Superconductivity; Superconductor-insulator transition
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179838
作者单位	SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, Menlo Park, CA 94025, United States; Department of Physics, Stanford University, Stanford, CA 94305, United States; Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, United States; Laboratorio de Nanobiomateriales, Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, 2390123, Chile; Department of Applied Physics, Stanford University, Stanford, CA 94305, United States; Department of Physics, Universidad de Los Andes, Bogotá, 111711, Colombia
推荐引用方式 GB/T 7714	Parra C.,Niestemski F.C.,Contryman A.W.,et al. Signatures of two-dimensional superconductivity emerging within a three-dimensional host superconductor[J],2021,118(16).
APA	Parra C..,Niestemski F.C..,Contryman A.W..,Giraldo-Gallo P..,Geballe T.H..,...&Manoharan H.C..(2021).Signatures of two-dimensional superconductivity emerging within a three-dimensional host superconductor.Proceedings of the National Academy of Sciences of the United States of America,118(16).
MLA	Parra C.,et al."Signatures of two-dimensional superconductivity emerging within a three-dimensional host superconductor".Proceedings of the National Academy of Sciences of the United States of America 118.16(2021).