Effective on-site interaction for dynamical mean-field theory

Autor(en)

Yusuke Nomura, Merzuk Kaltak, Kazuma Nakamura, Ciro Taranto, Shiro Sakai, Alessandro Toschi, Ryotaro Arita, Karsten Held, Georg Kresse, Masatoshi Imada

Abstrakt

A scheme to incorporate nonlocal polarizations into the dynamical mean-field theory (DMFT) and a tailormade way to determine the effective interaction for DMFT are systematically investigated. Applying it to the two-dimensional Hubbard model, we find that nonlocal polarizations induce a nontrivial filling-dependent antiscreening effect for the effective interaction. The present scheme combined with density functional theory offers an ab initio way to derive effective on-site interactions for the impurity problem in DMFT. We apply it to SrVO3 and find that the antiscreening competes with the screening caused by the off-site interaction.

Organisation(en)

Computergestützte Materialphysik

Externe Organisation(en)

University of Tokyo, Technische Universität Wien

Journal

Physical Review B

Band

86

Anzahl der Seiten

8

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.86.085117

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103015 Kondensierte Materie, 103025 Quantenmechanik, 103036 Theoretische Physik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/5ba267ea-7dca-46af-a717-90071357ad43