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Stripe-like nanoscale structural phase separation in superconducting BaPb1−xBixO3

Author

Listed:
  • P. Giraldo-Gallo

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University)

  • Y. Zhang

    (Ames Laboratory (USDOE), Iowa State University
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • C. Parra

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University
    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    Universidad Técnica Federico Santa María, Valparaíso)

  • H.C. Manoharan

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University
    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory)

  • M.R. Beasley

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University)

  • T.H. Geballe

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University)

  • M.J. Kramer

    (Ames Laboratory (USDOE), Iowa State University)

  • I.R. Fisher

    (Geballe Laboratory for Advanced Materials, Stanford University
    Stanford University)

Abstract

The phase diagram of BaPb1−xBixO3 exhibits a superconducting dome in the proximity of a charge density wave phase. For the superconducting compositions, the material coexists as two structural polymorphs. Here we show, via high-resolution transmission electron microscopy, that the structural dimorphism is accommodated in the form of partially disordered nanoscale stripes. Identification of the morphology of the nanoscale structural phase separation enables determination of the associated length scales, which we compare with the Ginzburg–Landau coherence length. We find that the maximum Tc occurs when the superconducting coherence length matches the width of the partially disordered stripes, implying a connection between the structural phase separation and the shape of the superconducting dome.

Suggested Citation

  • P. Giraldo-Gallo & Y. Zhang & C. Parra & H.C. Manoharan & M.R. Beasley & T.H. Geballe & M.J. Kramer & I.R. Fisher, 2015. "Stripe-like nanoscale structural phase separation in superconducting BaPb1−xBixO3," Nature Communications, Nature, vol. 6(1), pages 1-9, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9231
    DOI: 10.1038/ncomms9231
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