X-Ray Diffraction Observations of a Charge-Density-Wave Order in Superconducting Ortho-II YBa 2 Cu 3 O 6.54 Single Crystals in Zero Magnetic Field
2013; American Physical Society; Volume: 110; Issue: 13 Linguagem: Inglês
10.1103/physrevlett.110.137004
ISSN1092-0145
AutoresE. Blackburn, J. Chang, M. Hücker, A. T. Holmes, N. B. Christensen, Ruixing Liang, D. A. Bonn, W. N. Hardy, Uta Ruett, Olof Gutowski, M. v. Zimmermann, E. M. Forgan, S. M. Hayden,
Tópico(s)Magnetic and transport properties of perovskites and related materials
ResumoX-ray diffraction measurements show that the high-temperature superconductor ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.54}$, with ortho-II oxygen order, has charge-density-wave order in the absence of an applied magnetic field. The dominant wave vector of the charge density wave is ${\mathbf{q}}_{\mathrm{CDW}}=\mathbf{(}0,0.328(2),0.5\mathbf{)}$, with the in-plane component parallel to the $\mathbf{b}$ axis (chain direction). It has a similar incommensurability to that observed in ortho-VIII and ortho-III samples, which have different dopings and oxygen orderings. Our results for ortho-II contrast with recent high-field NMR measurements, which suggest a commensurate wave vector along the $\mathbf{a}$ axis. We discuss the relationship between spin and charge correlations in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$ and recent high-field quantum oscillation, NMR, and ultrasound experiments.
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