Flat-band materials such as the kagome metals or moiré superlattices are of intense current
interest. Flat bands can result from the electron motion on numerous (special) lattices and …

Electron correlations play a central role in iron-based superconductors. In these systems,
multiple Fe 3 d-orbitals are active in the low-energy physics, and they are not all degenerate …

Electron correlations amplify quantum fluctuations and, as such, are recognized as the origin
of many quantum phases. However, whether strong correlations can lead to gapless …

Strange metal behavior refers to a linear temperature dependence of the electrical resistivity
that is not due to electron–phonon scattering. It is seen in numerous strongly correlated …

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 …

Motivated by the recent low-temperature experiments on bulk FeSe, we study the electron
correlation effects in a multiorbital model for this compound in the nematic phase using the U …

There is increasing recognition that the multiorbital nature of the 3 d electrons is important to
the proper description of the electronic states in the normal state of the iron-based …

Quantum materials featuring both itinerant and localized degrees of freedom exhibit
numerous exotic phases and transitions that deviate from the Ginzburg-Landau paradigm …

A repulsive Coulomb interaction between electrons in different orbitals in correlated
materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital …

How electronic topology develops in strongly correlated systems represents a fundamental
challenge in the field of quantum materials. Recent studies have advanced the …