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Dresden 2003 – scientific programme

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TT: Tiefe Temperaturen

TT 13: Systeme korrelierter Elektronen: Theorie II

TT 13.2: Talk

Wednesday, March 26, 2003, 15:00–15:15, HSZ304

Explanation of the similarity of the experimental photoemission spectra of SrVO3 and CaVO3 — •Georg Keller1, Igor Nekrasov2, Danila E. Kondakov2, Anton V. Kozhevnikov2, Thomas Pruschke1, Karsten Held3, Dieter Vollhardt1, and Vladimir I. Anisimov21Theoretische Physik III, Institut für Physik, Universität Augsburg, 86135 Augsburg — 2Institut für Metallphysik, Ekaterinburg GSP-170, Russland — 3Max Planck Institut für Festkörperforschung, 70569 Stuttgart

We present parameter-free LDA+DMFT calculations for the many-particle density of states of cubic SrVO3 and orthorhombic CaVO3. Both systems are found to be strongly correlated metals, but not on the verge of a metal-insulator transition. In spite of the considerably smaller V-O-V bonding angle in CaVO3 the photoemission spectra of the two systems are very similar, their quasiparticle parts being almost identical, in agreement with recent bulk-sensitive photoemission experiments.

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