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

Haase, J.; Sushkov, O. P.; Horsch, P.; Williams, G. V. M.

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

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Sushkov, O. P.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Horsch, P.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Haase, J., Sushkov, O. P., Horsch, P., & Williams, G. V. M. (2004). Planar Cu and O hole densities in high-T_c cuprates determined with NMR. Physical Review B, 69(9): 094504.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F673-B

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
La2-xSrxCuO4 and YBa2Cu3O6+y and to determine the hole densities at
both sites as a function of doping. It is found that in La2-xSrxCuO4
all doped holes (x) reside in the Cu-O plane, but almost exclusively at
O. For YBa2Cu3O6+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 La2-xSrxCuO4 and the two
planar O sites in YBa2Cu3O6+y and consequences for the phase diagram
are discussed.