Cardarelli, Lorenzo Julià-Farré, Sergi Lewenstein, Maciej Dauphin, Alexandre Müller, Markus
Published in
Quantum Science and Technology
The interplay between many-body interactions and the kinetic energy gives rise to rich phase diagrams hosting, among others, interaction-induced topological phases. These phases are characterized by both a local order parameter and a global topological invariant, and can exhibit exotic ground states such as self-trapped polarons and interaction-ind...
Najafi, Khadijeh Jacoby, J Alexander Nesselrodt, R D Freericks, J K
Published in
Journal of Physics A: Mathematical and Theoretical
We derive a general procedure for evaluating the nth derivative of a time-dependent operator in the Heisenberg representation and employ this approach to calculate the zeroth to third spectral moment sum rules of the retarded electronic Green’s function and self-energy for a system described by the Holstein–Hubbard model allowing for arbitrary spat...
Leinders, Gregory Baldinozzi, Gianguido Ritter, Clemens Fischer, Henry Saniz, Rolando Arts, Ine Lamoen, Dirk Verwerft, Marc
The principal type of nuclear fuel material, which remains widely used today, is uranium dioxide (UO2). After discharge from a nuclear reactor some sort of disposal scenario needs to be considered to manage the spent fuel in a sustainable and safe way during extensive periods of time. However, in most countries which employ(ed) commercial nuclear e...
Beck, Sophie Hampel, Alexander Parcollet, Olivier Ederer, Claude Georges, Antoine
Published in
Journal of Physics: Condensed Matter
We present a fully charge self-consistent implementation of dynamical mean field theory (DMFT) combined with density functional theory (DFT) for electronic structure calculations of materials with strong electronic correlations. The implementation uses the Quantum ESPRESSO package for the DFT calculations, the Wannier90 code for the up-/down-foldin...
Arovas, Daniel P. Berg, Erez Kivelson, Steven A. Raghu, Srinivas
Published in
Annual Review of Condensed Matter Physics
The repulsive Hubbard model has been immensely useful in understanding strongly correlated electron systems and serves as the paradigmatic model of the field. Despite its simplicity, it exhibits a strikingly rich phenomenology reminiscent of that observed in quantum materials. Nevertheless, much of its phase diagram remains controversial. Here, we ...
Klebl, Lennart Matthias
In this thesis, we develop methods to model the electronic structure and strong correlations in moiré heterostructures. First, we consider graphene based twisted heterostructures on the atomic scale, resolving the intrinsic competition of two length scales inherent to moiré superlattices. We develop a variant of the random phase approximation to st...
Humbert, Vincent El Hage, Ralph Krieger, Guillaume Sanchez-Santolino, Gabriel Sander, Anke Collin, Sophie Trastoy, Juan Briatico, Javier Santamaria, Jacobo Preziosi, Daniele
...
Resistive switching effects offer new opportunities in the field of conventional memories as well as in the booming area of neuromorphic computing. Here the authors demonstrate memristive switching effects produced by a redox-driven oxygen exchange in tunnel junctions based on NdNiO3, a strongly correlated electron system characterized by the prese...
Mirjolet, Mathieu Rivadulla, Francisco Marsik, Premysl Borisov, Vladislav Valenti, Roser Fontcuberta, Josep
Understanding the physics of strongly correlated electronic systems has been a central issue in condensed matter physics for decades. In transition metal oxides, strong correlations characteristic of narrow d bands are at the origin of remarkable properties such as the opening of Mott gap, enhanced effective mass, and anomalous vibronic coupling, t...
Pourovskii, Leonid V. Khmelevskyi, Sergii
The nature of order in low-temperature phases of some materials is not directly seen by experiment. Such "hidden orders" (HO) may inspire decades of research to identify the mechanism underlying those exotic states of matter. In insulators, HO phases originate in degenerate many-electron states on localized f or d shells that may harbor high-rank m...
van Loon, Erik G C P
Published in
Journal of physics. Condensed matter : an Institute of Physics journal
In dynamical mean-field theory, the correlations between electrons are assumed to be purely local. The dual fermion approach provides a systematic way of adding non-local corrections to the dynamical mean-field theory starting point. Initial applications of this method were largely restricted to the single-orbital Hubbard model. Here, we present an...
