Doping-dependent bandwidth renormalization and spin-orbit coupling in (Sr$_{1-x}$La$_x$)$_2$RhO$_4$

Kyo-Hoon Ahn; Kwan-Woo Lee; Jan Kunes

doi:10.1088/0953-8984/27/8/085602

paper

Doping-dependent bandwidth renormalization and spin-orbit coupling in (Sr $_{1 - x}$ La $_{x}$ ) $_{2}$ RhO $_{4}$

arXiv:1412.4766 · doi:10.1088/0953-8984/27/8/085602

Abstract

We investigate the electronic structure of (Sr $_{1 - x}$ La $_{x}$ ) $_{2}$ RhO $_{4}$ 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 quasi-particle bandwidth increasing with $x$ . (Sr $_{1 - x}$ La $_{x}$ ) $_{2}$ RhO $_{4}$ can be classified as weakly correlated metal, which becomes an itinerant in-plane ferromagnet (but possibly A-type antiferromagnet) due to Stoner instability around $x = 0.2$ .

Corrected a factor of 2 error in our definition of doping x

Doping-dependent bandwidth renormalization and spin-orbit coupling in (Sr1−x​Lax​)2​RhO4​

Abstract

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Doping-dependent bandwidth renormalization and spin-orbit coupling in (Sr $_{1 - x}$ La $_{x}$ ) $_{2}$ RhO $_{4}$