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TT: Fachverband Tiefe Temperaturen

TT 68: Correlated Electrons: (General) Theory 1

TT 68.3: Vortrag

Mittwoch, 18. März 2015, 15:30–15:45, H 3010

Multi-orbital GW+(E)DMFT investigation of strongly correlated materials — •Lewin Boehnke1, Fredrik Nilsson2, Ferdi Aryasetiawan2, and Philipp Werner11University of Fribourg, Switzerland — 2Lund University, Sweden

The merits of the combination of the GW-formalism for non-local self-energy effects and (extended) dynamical mean field theory (E)DMFT to rigorously incorporate local fluctuations have been realized more than a decade ago [1], yet the numerical obstacles finding physically sound approximations for the respective parts prevented a broad adaption.

Previous approaches a GW+(E)DMFT treatment of strongly correlated multi-orbital electron systems employed various degrees of approximation for the DMFT impurity problem, the self-consistency and the interface of the two complementary methods.

We use suitable continuous time (CT-Hyb) solvers to deal with the frequency dependance of the impurity interaction and a fitted Matsubara-axis formulation of the GW-algorithm to examine the multi-orbital perspective to material investigations.


[1] Biermann, Aryasetiawan, Georges, PRL 90 (2003)

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DPG-Physik > DPG-Verhandlungen > 2015 > Berlin