Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 28: Correlated Electrons: General Theory
TT 28.6: Vortrag
Donnerstag, 30. März 2006, 11:15–11:30, HSZ 301
Momentum-resolved spectral functions of SrVO3 calculated by LDA+DMFT — •M. Kollar1, I. A. Nekrasov2,1, K. Held3, G. Keller1, D. E. Kondakov4, Th. Pruschke5, O. K. Andersen3, V. I. Anisimov4, and D. Vollhardt1 — 1Theoretical Physics III, University of Augsburg — 2Institute for Electrophysics, Ekaterinburg, Russia — 3MPI for Solid State Research, Stuttgart — 4Institute of Metal Physics, Ekaterinburg, Russia — 5Institute for Theoretical Physics, University of Göttingen
We have calculated momentum-resolved spectral functions of SrVO3 using LDA+DMFT [1]. To this end, we have employed Nth order muffin-tin (NMTO) downfolding to set up an effective low-energy Hamiltonian with three t2g orbitals. This effective Hamiltonian was solved by DMFT. Our results for momentum-dependent spectra show renormalized quasiparticle bands over a broad energy range from -0.7 eV to +0.9 eV with small “kinks” discernible in the dispersion below the Fermi energy. A similar feature was also found recently in angle-resolved photoemission experiments [2].
[1] I. A. Nekrasov et al., cond-mat/0508313.
[2] T. Yoshida et al., cond-mat/0504075.