Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Nicolaus Parragh"'
Autor:
Markus Wallerberger, Patrik Gunacker, Alexander Kowalski, Nicolaus Parragh, Andreas Hausoel, Giorgio Sangiovanni, Florian Goth, Karsten Held
We describe the hybridization-expansion continuous-time quantum Monte Carlo code package "w2dynamics", developed in Wien and W\"urzburg. We discuss the main features of this multi-orbital quantum impurity solver for the Anderson impurity model, dynam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25559d4dd76f46b90c5c96d1ff112b1d
http://arxiv.org/abs/1801.10209
http://arxiv.org/abs/1801.10209
Autor:
Nicolaus Parragh, Jan M. Tomczak, Ciro Taranto, Zhicheng Zhong, Markus Wallerberger, Karsten Held, Giorgio Sangiovanni, Alessandro Toschi
Publikováno v:
Physical Review Letters. 114
We employ density functional theory plus dynamical mean field theory and identify the physical origin of why two layers of SrVO(3) on a SrTiO(3) substrate are insulating: the thin film geometry lifts the orbital degeneracy, which in turn triggers a f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac437967bbe469668b3940c2e515f233
https://doi.org/10.1103/physrevlett.114.246401
https://doi.org/10.1103/physrevlett.114.246401
Current theoretical studies of electronic correlations in transition metal oxides typically only account for the local repulsion between d-electrons even if oxygen ligand p-states are an explicit part of the effective Hamiltonian. Interatomic interac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c1366727e21f34385012cd8adc61a79
https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-117165
https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-117165
Autor:
Giorgio Sangiovanni, Karsten Held, Philipp Hansmann, Alessandro Toschi, Nicolaus Parragh, S. Hummel
Publikováno v:
Physical Review B. 88
The effective crystal field in multiorbital correlated materials can be either enhanced or reduced by electronic correlations with crucial consequences for the topology of the Fermi surface and, hence, on the physical properties of these systems. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8348ef46307b7b384d871348fdedf87e
https://doi.org/10.1103/physrevb.88.195116
https://doi.org/10.1103/physrevb.88.195116
Autor:
Karsten Held, Georg Kresse, Giorgio Sangiovanni, Merzuk Kaltak, Alessandro Toschi, Ciro Taranto, Nicolaus Parragh
Publikováno v:
Physical Review B. 88
aK otaniSchilfgaarde is employed, and the interaction values are obtained from the locally unscreened random phase approximation (RPA) using a projection onto Wannier orbitals. We compare quasiparticle GW +DMFT and local density approximation (LDA) +
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56efd914138d7ab4df5d42d7f4aa81d9
https://doi.org/10.1103/physrevb.88.165119
https://doi.org/10.1103/physrevb.88.165119
Publikováno v:
Physical Review B. 86
In the context of realistic calculations for strongly correlated materials with $d$ or $f$ electrons the efficient computation of multi-orbital models is of paramount importance. Here we introduce a set of invariants for the $SU(2)$-symmetric Kanamor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73eefa2d77a01a82d0c9fe0ca4d71b60
https://doi.org/10.1103/physrevb.86.155158
https://doi.org/10.1103/physrevb.86.155158
Autor:
Nicolaus Parragh, Alessandro Toschi, Jan Kuneš, Vlastimil Křápek, Anton Kozhevnikov, Giorgio Sangiovanni
Publikováno v:
Physical Review Letters. 109
We employ the combination of the density functional and the dynamical mean-field theory (LDA+DMFT) to investigate the electronic structure and magnetic properties of SrCoO3, monocrystal of which were prepared recently. Our calculations lead to a ferr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5c19de80ff8b36d917717a6a02d6b6a
https://doi.org/10.1103/physrevlett.109.117206
https://doi.org/10.1103/physrevlett.109.117206