Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.36: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Variational Cluster Approximation for Spin Liquids — •Teresa Schaller and Maria Daghofer — Institut für funktionelle Materie und Quantentechnologien, Universität Stuttgart, Deutschland
We use the variational cluster approximation to investigate the phase diagram and one-particle spectral density of multi-band Hubbard models. The approach includes quantum fluctuations on a small cluster exactly and long-range order on a mean-field level. We will in particular investigate the filling of five electrons in the t2g subshell, as it is realized in some iridium compounds. The interaction of Hund’s rule and spin-orbit coupling leads to various magnetic orderings in the ground state. We present the phase diagram resulting from this competition and the impact of crystal-field splitting.