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Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy

M. Hücker, N. B. Christensen, A. T. Holmes, E. Blackburn, E. M. Forgan, Ruixing Liang, D. A. Bonn, W. N. Hardy, O. Gutowski, M. v. Zimmermann, S. M. Hayden, and J. Chang
Phys. Rev. B 90, 054514 – Published 21 August 2014

Abstract

To explore the doping dependence of the recently discovered charge-density-wave (CDW) order in YBa2Cu3Oy, we present a bulk-sensitive high-energy x-ray study for several oxygen concentrations, including strongly underdoped YBa2Cu3O6.44. Combined with previous data around the so-called 1/8 doping, we show that bulk CDW order exists at least for hole concentrations (p) in the CuO2 planes of 0.078p0.132. This implies that CDW order exists in close vicinity to the quantum critical point for spin-density-wave (SDW) order. In contrast to the pseudogap temperature T*, the onset temperature of CDW order decreases with underdoping to TCDW90 K in YBa2Cu3O6.44. Together with a weakened order parameter this suggests a competition between CDW and SDW orders. In addition, the CDW order in YBa2Cu3O6.44 shows the same type of competition with superconductivity as a function of temperature and magnetic field as samples closer to p=1/8. At low p the CDW incommensurability continues the previously reported linear increasing trend with underdoping. In the entire doping range the in-plane correlation length of the CDW order in b axis direction depends only very weakly on the hole concentration, and appears independent of the type and correlation length of the oxygen-chain order. The onset temperature of the CDW order is remarkably close to a temperature T that marks the maximum of 1/(T1T) in planar Cu63 NQR/NMR experiments, potentially indicating a response of the spin dynamics to the formation of the CDW. Our discussion of these findings includes a detailed comparison to the charge stripe order in La2xBaxCuO4.

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  • Received 28 May 2014
  • Revised 30 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.054514

©2014 American Physical Society

Authors & Affiliations

M. Hücker1, N. B. Christensen2, A. T. Holmes3, E. Blackburn3, E. M. Forgan3, Ruixing Liang4,5, D. A. Bonn4,5, W. N. Hardy4,5, O. Gutowski6, M. v. Zimmermann6, S. M. Hayden7, and J. Chang8

  • 1Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
  • 3School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
  • 4Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada V6T 1Z1
  • 5Canadian Institute for Advanced Research, Toronto, Canada M5G 1Z8
  • 6Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany
  • 7H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, United Kingdom
  • 8Institut de la Materiere Complexe, Ecole Polytechnique de Lausanna (EPFL), CH-1015 Lausanne, Switzerland

See Also

Resonant x-ray scattering study of charge-density wave correlations in YBa2Cu3O6+x

S. Blanco-Canosa, A. Frano, E. Schierle, J. Porras, T. Loew, M. Minola, M. Bluschke, E. Weschke, B. Keimer, and M. Le Tacon
Phys. Rev. B 90, 054513 (2014)

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Vol. 90, Iss. 5 — 1 August 2014

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