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Dual-Fermion approach to Non-equilibrium strongly correlated problems
C. Jung, A. Lieder, S. Brener +6
We present a generalization of the recently developed dual fermion approach introduced for correlated lattices to non-equilibrium problems. In its local limit, the approach has bee…
Non-quasiparticle states in CoMnSi evidenced through magnetic tunnel junction spectroscopy measurements
L. Chioncel, Y. Sakuraba, E. Arrigoni +6
We investigate the effects of electronic correlations in the full-Heusler CoMnSi, by combining a theoretical analysis of the spin-resolved density of states with tunneling-cond…
Dual fermion approach to nonlocal correlations in the Hubbard model
A. N. Rubtsov, M. I. Katsnelson, A. I. Lichtenstein
A new diagrammatic technique is developed to describe nonlocal effects (e.g., pseudogap formation) in the Hubbard-like models. In contrast to cluster approaches, this method utiliz…
Half-metallic ferromagnetism induced by dynamic electron correlations in VAs
L. Chioncel, Ph. Mavropoulos, M. Ležaić +4
The electronic structure of the VAs compound in the zinc-blende structure is investigated using a combined density-functional and dynamical mean-field theory approach. Contrary to…
Spin-polarized scanning tunneling microscopy of half-metallic ferromagnets: Non-quasiparticle contributions
V. Yu. Irkhin, M. I. Katsnelson
The role of the many-body (spin-polaronic) effects in the scanning tunneling spectroscopy of half-metallic ferromagnets (HMF) is considered. It is shown that the non-quasiparticle…
Nature of non-magnetic strongly-correlated state in delta-plutonium
L. V. Pourovskii, M. I. Katsnelson, A. I. Lichtenstein +6
Ab-initio relativistic dynamical mean-field theory is applied to resolve the long-standing controversy between theory and experiment in the "simple" face-centered cubic phase of pl…