Neutron spectroscopy and diffraction studies of the high-T"c superconductor HoBa"2Cu"3O"x - Staub, U.; Allenspach, P.; Mesot, J.; Furrer, A.; Blank, H.; Mutka, H. (Elsevier)
Neutron spectroscopy has been employed to observe the crystal field in the high-T"c superconductor HoBa"2Cu"3O"x (6〈x〈7) as a direct probe of the local charge distribution around the Ho site. Our results confirm in a very direct way the charge transfer model which so far has been established by considering bond valence sums derived from the structural parameters.
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Keywords: U