Absence of orbital-selective Mott transition in Ca_2-xSr_xRuO4

Details Absence of orbital-selective Mott transition in Ca_2-xSr_xRuO4 Absence of orbital-selective Mott transition in Ca_2-xSr_xRuO4

2003-01-28

arxiv.org/abs/cond-mat/0301536v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

Quasi-particle spectra of the layer perovskite Sr$_2$RuO$_4$ are calculated within Dynamical Mean Field Theory for increasing values of the on-site Coulomb energy $U$. At small $U$ the planar geometry splits the $t_{2g}$ bands near $E_F$ into a wide, two-dimensional $d_{xy}$ band and two narrow, nearly one-dimensional $d_{xz,yz}$ bands. At larger $U$, however, the spectral distribution of these states exhibit similar correlation features, suggesting a common metal-insulator transition for all $t_{2g}$ bands at the same critical $U$.

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