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Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.67</sub>

ORAL

Abstract

Application of magnetic field induces new charge density wave (CDW) order in the high-temperature superconductor YBa2Cu3O7−x (YBCO), which is defined here as ferro-coupled CDW (F-CDW). It can be differentiated from the conventional antiferro-coupled CDW (or AF-CDW) by their c-axis correlations. This discovery has provoked a number of questions such as how does superconductivity compete with two CDW orders? and are either of these orders responsible for the electronic reconstruction? High-energy x-ray diffraction experiements were carried out to find a clue to those questions. The intensity of F-CDW order in YBa2Cu3O6.67 was investigated as a function of magnetic field and temperature. We found that F-CDW order exists from low-field range B ~ 5 T, and regions of the sample with F-CDW order suppress superconductivity stronger than those with AF-CDW order. It implies that the superconducting state in some regions is more fragile than that in the other regions. In addition, F-CDW order has sufficiently long correlation length to explain the reconstruction of the electronic state. Our study sheds a light on the role of F-CDW order in superconducting and normal state properties of underdoped YBCO.

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Presenters

  • Jaewon Choi

    Physik-Institut, University of Zurich

Authors

  • Jaewon Choi

    Physik-Institut, University of Zurich

  • Oleh Ivashko

    Deutsches Elektronen-Synchrotron DESY, Deutsches Elektronen Synchrotron DESY

  • Elizabeth Blackburn

    Department of Physics, Lund University, Lund University

  • Ruixing Liang

    Department of Physics & Astronomy, University of British Columbia, University of British Columbia, University of British Colombia

  • Douglas Andrew Bonn

    University of British Columbia, Department of Physics & Astronomy, University of British Columbia, Stewart Blusson Quantum Matter Institute, University of British Columbia

  • Walter N Hardy

    Department of Physics & Astronomy, University of British Columbia, University of British Colombia

  • Alexander Holmes

    European Spallation Source

  • Niels Bech Christensen

    Department of Physics, Technical University of Denmark

  • Markus Huecker

    Department of Condensed Matter Physics, Weizmann Institute of Science

  • Simon Gerber

    LNS, PSI, Laboratory for Micro and Nanotechnology, Paul Scherrer Institut

  • Olof Gutowski

    Deutsches Elektronen-Synchrotron DESY

  • Uta Ruett

    Deutsches Elektronen-Synchrotron DESY

  • Martin von Zimmermann

    Deutsches Elektronen-Synchrotron DESY, Deutsches Elektronen Synchrotron DESY

  • Edward M. Forgan

    Department of Physics & Astronomy, University of Birmingham

  • Stephen Hayden

    H. H. Wills Physics Laboratory, University of Bristol, Univ of Bristol, University of Bristol, UK

  • Johan Chang

    Physik-Institut, University of Zurich, Physics Department, University of Zurich