Crystal-field spectrum in RBa2Cu3Ox (R = Er, Ho) high-Tc superconductors: Evidence for charge order in CuO2 planes

A. Mirmelstein, A. Podlesnyak, V. Bobrovskii, I. Zhdakhin

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9 Scopus citations

Abstract

A model of the crystal field generated by aperiodic array of charged tapes is developed to analyse the crystal-field interaction in RBa2CuxOx (R = Er, Ho) high-Tc copper oxides observed by the inelastic neutron scattering technique. The explicit calculation of the parameters of the Stevens Hamiltonian describing crystalline electric field effects in solids is performed for a specific charge density distribution uniformly extended in a certain direction of the crystal lattice. The model accounts for the x-dependence of the crystal-field parameters and allows us to determine the hole concentration in the CuO2 planes as a function of oxygen stoichiometry. The model of the periodic array of charged tapes suggests a charge order induced in the CuO2 planes by doping.

Original languageEnglish
Pages (from-to)7155-7173
Number of pages19
JournalJournal of Physics Condensed Matter
Volume11
Issue number37
DOIs
StatePublished - Sep 20 1999
Externally publishedYes

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