2003/02/04 by Emil S. Božin, E. S. Bozin, Simon J. L. Billinge +3 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0302062
6 pages, 4 figures, submitted to Phys. Rev. B
openalex publication_date 2003/02/04 · arxiv created 2005/10/06 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
By considering both the average structural parameters obtained from Rietveld refinement of neutron powder diffraction data, and the local structural parameters obtained from the atomic pair distribution function, we have tested the recent hypothesis of Perry et al [Perry et al., Phys. Rev. B v.65, 144501 (2002)] that doping in La2-xSrxCuO4 system occurs as localized defects of predominantly Cud3z2-r2--Opz character associated with the Sr dopants accompanied by a local destruction of the Jahn-Teller distortion. While the structural parameters behave qualitatively according to the prediction of this model, a quantitative analysis indicates that doped holes predominantly appear in the planar Cudx2-y2--Opx,y band as is normally assumed. However, a small amount of the doped charge does enter the Cud3z2-r2--Opz orbitals and this should be taken into account when theoretical phase diagrams are compared to experiment. We present a calibration curve, p = x (1.00(1) - 0.45(7) x), for the planarcharge doping, p, vs strontium content, x, for the La2-xSrxCuO4 system.