Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
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 Werner1 — 1University 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)