508 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT203 papers
- Centre National de la Recherche ScientifiqueFR156 papers
- Deutsches Elektronen-Synchrotron DESYDE152 papers
- European Organization for Nuclear ResearchCH147 papers
- Universität HamburgDE147 papers
- Princeton UniversityUS145 papers
- RWTH Aachen UniversityDE144 papers
- Eötvös Loránd UniversityHU143 papers
- Rutgers, The State University of New JerseyUS143 papers
- Tata Institute of Fundamental ResearchIN143 papers
- University of California San DiegoUS143 papers
- University of Wisconsin–MadisonUS143 papers
46 papers · 1 filter
Long-lived Higgs modes in strongly correlated condensates
J. Lorenzana, G. Seibold
We investigate order parameter fluctuations in the Hubbard model within a time-dependent Gutzwiller approach. While in the weak coupling limit we find that the amplitude fluctuatio…
The Breakdown of Mott Physics at VO Surfaces
Matthew J. Wahila, Nicholas F. Quackenbush, Jerzy T. Sadowski +12
Transition metal oxides such as vanadium dioxide (VO), niobium dioxide (NbO), and titanium sesquioxide (TiO) are known to undergo a temperature-dependent metal-insu…
Charge and pairing dynamics in the attractive Hubbard model: mode coupling and the validity of linear-response theory
Jörg Bünemann, Götz Seibold
Pump-probe experiments have turned out as a powerful tool in order to study the dynamics of competing orders in a large variety of materials. The corresponding analysis of the data…
Gutzwiller variational approach to the two-impurity Anderson model at particle-hole symmetry
Thorben Linneweber, Jörg Bünemann, Zakaria M. M. Mahmoud +1
We study Gutzwiller-correlated wave functions as variational ground states for the two-impurity Anderson model (TIAM) at particle-hole symmetry as a function of the impurity separa…
Non-interacting two-impurity Anderson model on a lattice at particle-hole symmetry
Zakaria M. M. Mahmoud, Jörg Bünemann, Florian Gebhard
We study the non-interacting two-impurity Anderson model on a lattice using the Green function equation-of-motion method. A case of particular interest is the RKKY limit that is ch…
Coulomb matrix elements in multi-orbital Hubbard models
Jörg Bünemann, Florian Gebhard
Coulomb matrix elements are needed in all studies in solid-state theory that are based on Hubbard-type multi-orbital models. Due to symmetries, the matrix elements are not independ…
Exchange couplings for Mn ions in CdTe: validity of spin models for dilute magnetic II-VI semiconductors
Thorben Linneweber, Jörg Bünemann, Ute Löw +2
We employ density-functional theory (DFT) in the generalized gradient approximation (GGA) and its extensions GGA+ and GGA+Gutzwiller to calculate the magnetic exchange couplings…
Interplay of Coulomb interaction and spin-orbit coupling
Jörg Bünemann, Thorben Linneweber, Ute Löw +2
We employ the Gutzwiller variational approach to investigate the interplay of Coulomb interaction and spin-orbit coupling in a three-orbital Hubbard model. Already in the paramagne…
Coexistence of Nematic Order and Superconductivity in the Hubbard Model
Jan Kaczmarczyk, Tobias Schickling, Jörg Bünemann
We study the interplay of nematic and superconducting order in the two-dimensional Hubbard model and show that they can coexist, especially when superconductivity is not the energe…
Evaluation techniques for Gutzwiller wave functions in finite dimensions
Jan Kaczmarczyk, Tobias Schickling, Jörg Bünemann
We give a comprehensive introduction into a diagrammatic method that allows for the evaluation of Gutzwiller wave functions in finite spatial dimensions. We discuss in detail some…
Exact response functions within the time-dependent Gutzwiller approach
J. Bünemann, S. Wasner, E. v. Oelsen +1
We investigate the applicability of the two existing versions of a time-dependent Gutzwiller approximation (TDGA) beyond the frequently used limit of infinite spatial dimensions. T…
Linear-Response Dynamics from the Time-Dependent Gutzwiller Approximation
J. Bünemann, M. Capone, J. Lorenzana +1
Within a Lagrangian formalism we derive the time-dependent Gutzwiller approximation for general multi-band Hubbard models. Our approach explicitly incorporates the coupling between…
High-temperature superconductivity in the Hubbard model: Gutzwiller wave-function solution
J. Kaczmarczyk, J. Spałek, T. Schickling +1
A systematic diagrammatic expansion for Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hu…
Stripes in cuprate superconductors: Excitations and dynamic dichotomy
G. Seibold, M. Grilli, J. Lorenzana
We present a short account of the present experimental situation of stripes in cuprates followed by a review of our present understanding of their ground state and excited state pr…
Numerical minimisation of Gutzwiller energy functionals
Jörg Bünemann, Florian Gebhard, Tobias Schickling +1
We give a comprehensive introduction into an efficient numerical scheme for the minimisation of Gutzwiller energy functionals in studies on multi-band Hubbard models. Our method co…
Gutzwiller theory of band magnetism in LaOFeAs
Tobias Schickling, Florian Gebhard, Jörg Bünemann +3
We use the Gutzwiller variational theory to calculate the ground-state phase diagram and quasi-particle bands of LaOFeAs. The Fe3d--As4p Wannier-orbital basis obtained from density…
Variational study of Fermi-surface deformations in Hubbard models
Jörg Bünemann, Tobias Schickling, Florian Gebhard
We study the correlation-induced deformation of Fermi surfaces by means of a new diagrammatic method which allows for the analytical evaluation of Gutzwiller wave functions in fini…
Time-Dependent Gutzwiller Theory for Multiband Hubbard Models
E. v. Oelsen, G. Seibold, J. Buenemann
Based on the variational Gutzwiller theory, we present a method for the computation of response functions for multiband Hubbard models with general local Coulomb interactions. The…
The time-dependent Gutzwiller theory for multi-band Hubbard models
E. v. Oelsen, G. Seibold, J. Bünemann
We formulate a multi-band generalisation of the time-dependent Gutzwiller theory. This approach allows for the calculation of general two-particle response functions, which are cru…
Influence of correlations on transitive electron-phonon couplings in cuprate superconductors
G. Seibold, M. Grilli, J. Lorenzana
We investigate a model for the CuO_2 plane of high-T_c superconductors where the charge carriers are coupled to A_{1g} and B_{1g} symmetric out-of plane vibrations of the oxygen at…
Antiferromagnetic order in multi-band Hubbard models for iron-pnictides
Tobias Schickling, Florian Gebhard, Jörg Bünemann
We investigate multi-band Hubbard models for the three iron 3- bands and the two iron 3- bands in by means of the Gutzwiller variational theor…
Spin canting as a result of the competition between stripes and spirals in cuprates
G. Seibold, R. S. Markiewicz, J. Lorenzana
Based on the extended Hubbard model we calculate the energy of stripe and spiral ground states. We find that uniform spirals get favored by a large ratio but are unstable at…
Phonon renormalization from local and transitive electron-lattice couplings in strongly correlated systems
E. von Oelsen, A. Di Ciolo, J. Lorenzana +2
Within the time-dependent Gutzwiller approximation (TDGA) applied to Holstein- and SSH-Hubbard models we study the influence of electron correlations on the phonon self-energy. For…
Diagonal stripes in the spin glass phase of cuprates
G. Seibold, J. Lorenzana
Based on the unrestricted Gutzwiller approximation we study the possibility that the diagonal incommensurate spin scattering in the spin glass phase of lanthanum cuprates originate…