Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 84: Correlated Electrons: (General) Theory
TT 84.8: Vortrag
Donnerstag, 3. April 2014, 11:30–11:45, HSZ 304
Divergent precursors of the Mott metal-insulator transition in dynamical mean field theory and beyond — •T. Schäfer1, G. Rohringer1, O. Gunnarsson2, S. Ciuchi3, G. Sangiovanni4, E. Gull5, J. LeBlanc6, P. Thunström1, M. Wallerberger1, and A. Toschi1 — 1Institute of Solid State Physics, Vienna University of Technology, Austria — 2Max Planck Institute for Solid State Research, Stuttgart, Germany — 3Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, Italy — 4Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Germany — 5Department of Physics, University of Michigan, USA — 6Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
Bulk electronic correlated systems can be often successfully studied by dynamical mean field theory (DMFT), which is able to properly describe the intrinsically non-perturbative phenomenon of the Mott-Hubbard metal-to-insulator transition (MIT). Recently it has been shown that the first hallmarks of the MIT can already be identified well inside the metallic regime in terms of divergences of the two-particle irreducible vertex [1].
In this talk the non-perturbative region of the Hubbard model’s phase diagram beyond the first precursor line towards the MIT is explored in more detail and, eventually, the effects of the inclusion of short-ranged spatial correlations are discussed [2].
T. Schaefer, G. Rohringer, O. Gunnarsson, S. Ciuchi, G. Sangiovanni, and A. Toschi, Phys. Rev. Lett. 110, 246405 (2013)
T. Schaefer et al., in preparation