Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Poster Session: Correlated Electrons 2

TT 20.1: Poster

Montag, 20. März 2017, 15:00–19:00, P2-OG1

Mott-Hubbard transition in the mass-imbalanced Hubbard model — •Marie-Therese Philipp, Markus Wallerberger, Patrik Gunacker, and Karsten Held — Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria

The mass-imbalanced Hubbard model (HM) represents a continuous evolution from the Hubbard to the Falicov-Kimball model. We employ DMFT and study the paramagnetic metal-insulator transition (MIT). Our results indicate that the MIT rather resembles that of the HM as soon as a tiny hopping between the more localized fermions is switched on. Further due to the equalising power of the Kondo e ect, the MIT occurs simultaneously for both spin species, opposed to what is known for the multi-orbital HM.