49 citations
- Forschungszentrum JülichDE10 papers
- Jülich Aachen Research AllianceDE5 papers
- RWTH Aachen UniversityDE4 papers
- Democritus University of ThraceGR2 papers
- Johannes Gutenberg University MainzDE2 papers
- University of GroningenNL2 papers
- University of StuttgartDE2 papers
- Aachen Institute for Advanced Study in Computational Engineering ScienceDE1 paper
- American Institute of Aeronautics and AstronauticsUS1 paper
- Bhabha Atomic Research CentreIN1 paper
- Clausthal University of TechnologyDE1 paper
- Czech Academy of SciencesCZ1 paper
5 papers · 1 filter
Thermally assisted ordering in Mott insulators
Hunter Sims, Eva Pavarini, Erik Koch
Ginzburg-Landau theory describes phase transitions as the competition between energy and entropy: The ordered phase has lower energy, while the disordered phase has larger entropy.…
Multiplet effects in orbital and spin ordering phenomena: A hybridization-expansion quantum impurity solver study
Andreas Flesch, Evgeny Gorelov, Erik Koch +1
Orbital and spin ordering phenomena in strongly correlated systems are commonly studied using the local-density approximation + dynamical mean-field theory approach. Typically, how…
Importance of exchange-anisotropy and superexchange for the spin-state transitions in LnCoO3 (Ln=La,Y,RE) cobaltates
Guoren Zhang, Evgeny Gorelov, Erik Koch +1
Spin-state transitions are the hallmark of rare-earth cobaltates. In order to understand them, it is essential to identify all relevant parameters which shift the energy balance be…
Orbital-order melting in rare-earth manganites: the role of super-exchange
Andreas Flesch, Guoren Zhang, Erik Koch +1
We study the mechanism of orbital-order melting observed at temperature T_OO in the series of rare-earth manganites. We find that many-body super-exchange yields a transition-tempe…
Determination of screened Coulomb repulsion energies in organic molecular crystals: A real space approach
Laura Cano-Cortes, Andreas Dolfen, Jaime Merino +1
We present a general method for determining screened Coulomb parameters in molecular assemblies, in particular organic molecular crystals. This allows us to calculate the interacti…