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| BSCCO | |
|---|---|
| Name | BSCCO |
| Composition | Bi–Sr–Ca–Cu–O |
| Category | High-temperature superconductor |
| Discovered | 1988 |
BSCCO Bismuth strontium calcium copper oxide (BSCCO) denotes a family of layered cuprate superconductors that attracted rapid attention after the discovery era that included Paul C. W. Chu, Johannes Georg Bednorz, Alex Müller, Wu Ta-You, and institutions such as the IBM Research and the University of Geneva. Early work involved collaborations among groups at University of Houston, Texas A&M University, MIT, Bell Labs, Los Alamos National Laboratory, and Argonne National Laboratory, influencing progress at facilities like the National High Magnetic Field Laboratory and the European Synchrotron Radiation Facility.
BSCCO encompasses several stoichiometries identified by their nominal layer counts and critical temperatures, including phases discovered in the late 1980s through multinational teams at institutions such as University of Cambridge, Columbia University, Stanford University, University of California, Berkeley, University of Tokyo, and Max Planck Society. The principal phases—commonly called 2201, 2212, 2223—are linked to experimental reports from groups at Argonne National Laboratory, Oak Ridge National Laboratory, Lawrence Berkeley National Laboratory, Rutherford Appleton Laboratory, Soviet Academy of Sciences collaborators, and later refinements at CEA Saclay and National Institute for Materials Science (NIMS). Industrial interest from companies like Siemens, IBM, General Electric, and Sumitomo Electric drove device-oriented research at Hitachi and Furukawa Electric.
The BSCCO family shows layered perovskite-related structures described in crystallography studies tied to teams at University of Oxford, University of Paris-Sud, University of Bristol, ETH Zurich, and University of Cambridge (UK). The 2201 phase corresponds to monolayer stacks reported by laboratories at University of Geneva and University of Minnesota, while the 2212 phase (Bi-2212) and 2223 phase (Bi-2223) were elucidated by collaborators at University of Illinois Urbana-Champaign, University of California, Los Angeles, and Tohoku University. Structural motifs include bismuth oxide layers, strontium oxide planes, calcium interlayers, and copper-oxide planes similar to motifs analyzed by researchers at Columbia University and Brookhaven National Laboratory. High-resolution transmission electron microscopy work at Hitachi Cambridge Lab and Japan Fine Ceramics Center provided lattice images; diffraction studies at Diamond Light Source and Advanced Photon Source constrained atomic positions. Chemical substitution and oxygen stoichiometry studies involved teams from Nanyang Technological University, Korea Advanced Institute of Science and Technology, and University of Toronto.
Critical temperatures and anisotropic superconducting gaps were characterized in experiments by groups at Stanford Linear Accelerator Center, University of Colorado Boulder, University of Illinois, University of Geneva, and Institut Laue-Langevin. Bi-2212 exhibits high critical current density in textured tapes developed with partners like American Superconductor Corporation and Furukawa Electric, paralleling performance comparisons with Yttrium barium copper oxide prototypes tested at Brookhaven National Laboratory and Oak Ridge National Laboratory. Vortex dynamics, flux creep, and pancake vortex phenomena were studied by theorists and experimentalists at Princeton University, Harvard University, Caltech, University of California, San Diego, University of Pisa, and University of Augsburg. Measurements by teams at Los Alamos National Laboratory and National High Magnetic Field Laboratory established upper critical fields and irreversibility lines.
Bulk synthesis and single-crystal growth used methods developed at Bell Labs, INEOS Oxford Research, University of Geneva, and University of Houston including solid-state reaction, melt-growth, and floating-zone techniques refined at Mitsubishi Electric and Tohoku University. Thin-film fabrication involved pulsed laser deposition and molecular beam epitaxy practiced at IBM Research, University of Michigan, Technical University of Munich, Korea Electrotechnology Research Institute, and University of Sydney. Wire and tape processing for Bi-2223 and Bi-2212 used powder-in-tube methods commercialized by American Superconductor Corporation, Sumitomo Electric, Bruker, and pilot plants associated with European Organization for Nuclear Research and ITER collaborators.
Applied research propelled prototypes for magnets, transformers, fault current limiters, and cables by consortia including ITER Organization, General Electric, Siemens, American Superconductor Corporation, Sumitomo Electric, and research centers at National Renewable Energy Laboratory, Brookhaven National Laboratory, Oak Ridge National Laboratory, and CERN. Imaging and detector technologies leveraging BSCCO junctions and intrinsic Josephson effects were developed at Rutherford Appleton Laboratory, Max Planck Institute for Solid State Research, Forschungszentrum Jülich, University of Cambridge, and Los Alamos National Laboratory. Commercialization pathways consulted standards bodies like International Electrotechnical Commission and involved partnerships with Hitachi, Furukawa Electric, and Toyota Central R&D Labs..
The pairing symmetry, pseudogap, and strong-correlation physics were debated in theoretical work at Princeton University, Harvard University, Massachusetts Institute of Technology, University of Chicago, Columbia University, University of California, Berkeley, École Normale Supérieure, Max Planck Institute for the Physics of Complex Systems, and Institute for Advanced Study. Models invoking antiferromagnetic fluctuations, spin-charge separation, and interlayer tunneling were advanced by researchers associated with Stanford University, University of Cambridge, University of Pennsylvania, California Institute of Technology, and Rutgers University. Numerical studies using dynamical mean-field theory and quantum Monte Carlo were carried out by groups at Oak Ridge National Laboratory, Los Alamos National Laboratory, Argonne National Laboratory, University of Illinois Urbana-Champaign, and Princeton University.
Characterization drew on angle-resolved photoemission spectroscopy, scanning tunneling microscopy, neutron scattering, muon spin rotation, and transport measurements performed at facilities such as Stanford Synchrotron Radiation Lightsource, Advanced Light Source, European Synchrotron Radiation Facility, ISIS Neutron and Muon Source, Institut Laue-Langevin, National High Magnetic Field Laboratory, and Brookhaven National Laboratory. ARPES experiments were conducted at Lawrence Berkeley National Laboratory and SLAC National Accelerator Laboratory; STM mapping was executed by teams at University of Illinois, Harvard University, and University of California, Berkeley; inelastic neutron scattering studies involved collaborations with Oak Ridge National Laboratory and Institut Laue-Langevin.
Category:High-temperature superconductors