Open AccessComment on quantitative model for the superconductivity suppression in R{sub 1-x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7} with different rare earths
Author(s) -
R. Fehrenbacher,
T. M. Rice
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/508156
Subject(s) - superconductivity , superconducting transition temperature , crystallography , electronic structure , atomic orbital , electrical resistivity and conductivity , materials science , x ray crystallography , sigma , electronic band structure , condensed matter physics , physics , analytical chemistry (journal) , chemistry , diffraction , nuclear physics , electron , optics , chromatography , quantum mechanics
In a recent letter, a model for the electronic structure of R{sub 1-x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7}, based on the LDA + U scheme was proposed. The T{sub c} suppression by Pr substitution was argued to be due to the transfer of holes from the superconducting CuO pd{sigma} to a dispersive pf{pi} band formed by O2p{sub {pi}} and Pr 4f orbitals. The insulating nature of PrBa{sub 2}Cu{sub 3}O{sub 7} was ascribed to disorder from Ba atoms on the Pr sites. The ac conductivity of the above compound is discussed