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Spatially correlated incommensurate lattice modulations in an atomically thin high-temperature Bi2.1Sr1.9CaCu2.0O8+y superconductor

Nicola Poccia, Shu Yang Frank Zhao, Hyobin Yoo, Xiaojing Huang, Hanfei Yan, Yong S. Chu, Ruidan Zhong, Genda Gu, Claudio Mazzoli, Kenji Watanabe, Takashi Taniguchi, Gaetano Campi, Valerii M. Vinokur, and Philip Kim
Phys. Rev. Materials 4, 114007 – Published 20 November 2020
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Abstract

We report high spatial resolution, below 100 nm, scanning nano x-ray diffraction (SnXRD) imaging of incommensurate lattice modulations (ILM) in Bi2.1Sr1.9CaCu2.0O8+y van der Waals heterostructures of thicknesses down to two unit cells. We reveal the distinct long-range and short-range ILMs in a bulk sample and at the surface. We find that the size and mutual orientation of the puddlelike domains of the ILM are determined by the dimensionality of the system. In the two-unit-cell sample, the wave vectors of the long- and short-range orders become anticorrelated, and the emergent spatial patterns have a directional gradient. These emergent patterns imply static mesoscopic lattice modulation. Our findings open a route for local strain engineering to modulate properties of two-dimensional high-temperature superconductors.

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  • Received 10 August 2020
  • Revised 15 October 2020
  • Accepted 20 October 2020

DOI:https://doi.org/10.1103/PhysRevMaterials.4.114007

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Nicola Poccia1,2, Shu Yang Frank Zhao2, Hyobin Yoo2, Xiaojing Huang3, Hanfei Yan3, Yong S. Chu3, Ruidan Zhong4, Genda Gu4, Claudio Mazzoli3, Kenji Watanabe5, Takashi Taniguchi6, Gaetano Campi7, Valerii M. Vinokur8,9, and Philip Kim2,*

  • 1Institute for Metallic Materials, IFW Dresden, 01069 Dresden, Germany
  • 2Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 3National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 4Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 5Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • 6International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • 7Institute of Crystallography, CNR, via Salaria Km 29.300, Monterotondo Roma 00015, Italy
  • 8Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60637, USA
  • 9Consortium for Advanced Science and Engineering (CASE), University of Chicago, 5801 S. Ellis Avenue, Chicago, Illinois 60637, USA

  • *Correspondence and requests for materials should be addressed to: pkim@physics.harvard.edu

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Issue

Vol. 4, Iss. 11 — November 2020

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