Strong electronic correlations are often associated with the proximity of a Mott-insulating
state. In recent years however, it has become increasingly clear that the Hund's rule …

A review of the basic ideas and techniques of the spectral density-functional theory is
presented. This method is currently used for electronic structure calculations of strongly …

The calculation of the electronic properties of materials is an important task of solid-state
theory, albeit particularly difficult if electronic correlations are strong, eg, in transition metals …

A recently developed continuous time solver based on an expansion in hybridization about
an exactly solved local limit is reformulated in a manner appropriate for general classes of …

Basic mechanisms controlling orbital order and orbital fluctuations in transition metal oxides
are discussed. The lattice driven classical orbital picture, eg like in manganites LaMnO 3, is …

A single-site dynamical mean-field study of a three band model with the rotationally invariant
interactions appropriate to the t 2 g levels of a transition metal oxide reveals a quantum …

We examine whether the Mott transition of a half-filled, two-orbital Hubbard model with
unequal bandwidths occurs simultaneously for both bands or whether it is a two-stage …

Using resistivity, heat-capacity, thermal-expansion, and susceptibility measurements we
study the normal-state behavior of KFe 2 As 2. Both the Sommerfeld coefficient (γ≈ 103 mJ …

The localization-delocalization transition is at the heart of strong correlation physics.
Recently, there is great interest in multiorbital systems where this transition can be restricted …

We study a multiband Hubbard model in its orbital-selective Mott phase, in which localized
electrons in a narrow band coexist with itinerant electrons in a wide band. The low-energy …