title: Stripe-like nanoscale structural phase separation in superconducting BaPb(1-x)Bi(x)O3.
abstract: The phase diagram of BaPb(1-x)Bi(x)O3 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.
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: P
authors.initials: P
authors.lastname: Giraldo-Gallo
authors.affiliation: Ames Laboratory (USDOE), Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020, USA.|Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Physics, Stanford University, Stanford, California 94305, USA.|Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.|Departmento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile.
authors.forename: C
authors.initials: C
authors.lastname: Parra
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Physics, Stanford University, Stanford, California 94305, USA.|Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: H C
authors.initials: HC
authors.lastname: Manoharan
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: M R
authors.initials: MR
authors.lastname: Beasley
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: T H
authors.initials: TH
authors.lastname: Geballe
authors.affiliation: Ames Laboratory (USDOE), Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Kramer
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.|Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: I R
authors.initials: IR
authors.lastname: Fisher