title: Doping-dependent bandwidth renormalization and spin-orbit coupling in (Sr1-xLax)2RhO4.
abstract: We investigate the electronic structure of (Sr1-xLax)2RhO4 using a combination of the density functional and dynamical mean-field theories. Unlike the earlier local density approximation plus Hubbard U (LDA + U) studies, we find no sizable enhancement of the spin-orbit splitting due to electronic correlations and show that such an enhancement is a spurious effect of the static mean-field approximation of the LDA + U method. The electron doping suppresses the importance of electronic correlations, which is reflected in the quasi-particle bandwidth increasing with x. (Sr1-xLax)2RhO4 can be classified as a weakly correlated metal, which becomes an itinerant in-plane ferromagnet (but possibly A-type antiferromagnet) due to Stoner instability around x = 0.2.
authors: Department of Applied Physics, Graduate School, Korea University, Sejong 339-700, Korea.
authors: Kyo-Hoon
authors: KH
authors: Ahn
authors: Kwan-Woo
authors: KW
authors: Lee
authors: Jan
authors: J
authors: Kuneš