Planar Cu and O hole densities in high-Tccuprates determined with NMR

2003/07/08 by J. Haase, Jürgen Haase, O. P. Sushkov +3 · 3 citations
Engineering · Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.69.094504

published as Phys. Rev. B 69, 094504 (2004) · 18 pages, 1 figure, 2 tables, 2 appendices

arxiv created 2003/07/08 · openalex publication_date 2004/03/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The electric hyperfine interaction observable in atomic spectroscopy for O and Cu ions in various configurations is used to analyze the quadrupole splitting of O and Cu nuclear magnetic resonance (NMR) in La_2\ensuremath-xSr_xCuO₄ and YBa₂Cu₃O_6+y and to determine the hole densities at both sites as a function of doping. It is found that in La_2\ensuremath-xSr_xCuO₄ all doped holes (x) reside in the Cu-O plane, but almost exclusively at O. For YBa₂Cu₃O_6+y and y<0.6 doped holes are found at planar Cu as well as O. For y>0.6 further doping increases the hole content only for planar O. The phase diagram based on NMR data is presented. Further implications from the Cu A and B sites in La_2\ensuremath-xSr_xCuO₄ and the two planar O sites in YBa₂Cu₃O_6+y and consequences for the phase diagram are discussed.

Citations

• Surprises in the doping dependence of the Fermi surface in Bi(Pb)-2212

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