NMR evidence for Friedel-like oscillations in the CuO chains of ortho-II YBa2Cu3O6.5

Z. Yamani, B. W. Statt, W. A. MacFarlane, Ruixing Liang, D. A. Bonn, and W. N. Hardy
Phys. Rev. B 73, 212506 – Published 28 June 2006

Abstract

Nuclear magnetic resonance (NMR) measurements of CuO chains of detwinned ortho-II YBa2Cu3O6.5 (YBCO6.5) single crystals reveal unusual and remarkable properties. The chain Cu resonance broadens significantly, but gradually, on cooling from room temperature. The line shape and its temperature dependence are substantially different from that of a conventional spin/charge density wave (S/CDW) phase transition. Instead, the line broadening is attributed to small amplitude static spin and charge density oscillations with spatially varying amplitudes connected with the ends of the finite length chains. The influence of this CuO chain phenomenon is also clearly manifested in the plane Cu NMR.

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  • Received 26 February 2006

DOI:https://doi.org/10.1103/PhysRevB.73.212506

©2006 American Physical Society

Authors & Affiliations

Z. Yamani1,*, B. W. Statt1, W. A. MacFarlane1,†, Ruixing Liang2, D. A. Bonn2, and W. N. Hardy2

  • 1Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada
  • 2Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada

  • *Permanent address: NRC, CNBC, Chalk River, Canada. Electronic address: Zahra.Yamani@nrc.gc.ca
  • Permanent address: Department of Chemistry, University of British Columbia, Canada.

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Vol. 73, Iss. 21 — 1 June 2006

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