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- W2019350077 abstract "The local electronic structure of YBa2Cu3O7 has been calculated using first-principles cluster methods. Several clusters embedded in an appropriate background potential have been investigated. The electric field gradients at the copper and oxygen sites are determined and compared to previous theoretical calculations and experiments. Spin polarized calculations with different spin multiplicities have enabled a detailed study of the spin density distribution to be made and a simultaneous determination of magnetic hyperfine coupling parameters. The contributions from on-site and transferred hyperfine fields have been disentangled with the conclusion that the transferred spin densities essentially are due to nearest neighbour copper ions only with marginal influence of ions further away. This implies that the variant temperature dependencies of the planar copper and oxygen NMR spin-lattice relaxation rates are only compatible with commensurate antiferromagnetic correlations. The theoretical hyperfine parameters are compared with those derived from experimental data." @default.
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- W2019350077 date "2001-09-01" @default.
- W2019350077 modified "2023-09-27" @default.
- W2019350077 title "First-principles calculation of electric field gradients and hyperfine couplings in YBa2Cu3O7" @default.
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- W2019350077 doi "https://doi.org/10.1007/s100510170077" @default.
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