Journal Article

PreJuSER-59216

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Subband Filling and Mott Transition in Ca2-xSrxRuO4

Liebsch, A.FZJ* ; Ishida, H.

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7753  doi:10.1103/PhysRevLett.98.216403

Abstract: A new concept is proposed for the paramagnetic metal insulator transition in the layer perovskite Ca2-xSrxRuO4. Whereas the pure Sr compound is metallic up to large Coulomb energies due to strong orbital fluctuations, structural changes induced by doping with Ca give rise to an interorbital charge transfer which makes the material extremely sensitive to local correlations. Using dynamical mean field theory based on finite temperature multiband exact diagonalization, it is shown that the combination of crystal field splitting and on-site Coulomb interactions leads to complete filling of the d(xy) band and to a Mott transition in the half-filled d(xz,yz) bands.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2007

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