30 citations · 122 across the 13 of their papers we have counts for
11 papers · 1 filter
Matrix-product-state-based band-Lanczos solver for quantum cluster approaches
Sebastian Paeckel, Thomas Köhler, Salvatore R. Manmana +1
We present matrix-product state (MPS) based band Lanczos method as solver for quantum cluster methods such as the variational cluster approximation. While a naïve implementation of…
Parametrization of the Coulomb interaction matrix with point-group symmetry
Coraline Letouzé, Guillaume Radtke, Benjamin Lenz +1
Coulomb integrals, i.e., matrix elements of bare or screened Coulomb interaction between one-electron orbitals, are fundamental objects in many approaches developed to tackle the c…
Order from disorder phenomena in BaCoS
Benjamin Lenz, Michele Fabrizio, Michele Casula
At the layered insulator BaCoS transitions to a columnar antiferromagnet that signals non-negligible magnetic frustration despite the relatively high $…
Two-dimensional fluctuations and competing phases in the stripe-like antiferromagnet BaCoS
Haneen Abushammala, Benjamin Lenz, Benoit Baptiste +5
By means of a combined x-ray diffraction, magnetic susceptibility and specific heat study, we investigate the interplay between orthorhombic distortion and stripe-like antiferromag…
Formation of CuO sublattices by suppression of interlattice correlations in tetragonal CuO
Max Bramberger, Benjamin Bacq-Labreuil, Martin Grundner +4
We investigate the tetragonal phase of the binary transition metal oxide CuO (t-CuO) within the context of cellular dynamical mean-field theory. Due to its strong antiferromagnetic…
ARPES study of orbital characters, symmetry breakings and pseudogaps in doped and pure Sr2IrO4
Alex Louat, Benjamin Lenz, Silke Biermann +6
Sr2IrO4 is characterized by a large spin-orbit coupling, which gives rise to bands with strongly entangled spin and orbital characters, called J=1/2 and J=3/2. We use light-polariz…
Magnetization density distribution of SrIrO: Deviation from a local picture
Jaehong Jeong, Benjamin Lenz, Arsen Gukasov +10
iridium oxides are of huge interest due to the potential for new quantum states driven by strong spin-orbit coupling. The strontium iridate SrIrO is particularly in th…
Spectral functions of SrIrO: theory versus experiment
Benjamin Lenz, Cyril Martins, Silke Biermann
The spin-orbit Mott insulator SrIrO has attracted a lot of interest in recent years from theory and experiment due to its close connection to isostructural high-tempera…
Non-local Coulomb correlations in pure and electron-doped : spectral functions, Fermi surface and pseudogap-like spectral weight distributions from oriented cluster dynamical mean field theory
Cyril Martins, Benjamin Lenz, Luca Perfetti +3
We address the role of non-local Coulomb correlations and short-range magnetic fluctuations in the high-temperature phase of SrIrO within state-of-the-art spectroscopic and…
Variational cluster approach to superconductivity and magnetism in the Kondo lattice model
Benjamin Lenz, Riccardo Gezzi, Salvatore R. Manmana
We investigate in detail antiferromagnetic (AF) and superconducting (SC) phases as well as their coexistence in the two-dimensional Kondo lattice model on a square lattice, which i…
Mott Quantum Criticality in the Anisotropic 2D Hubbard Model
Benjamin Lenz, Salvatore R. Manmana, Thomas Pruschke +2
We present evidence for Mott quantum criticality in an anisotropic two-dimensional system of coupled Hubbard chains at half-filling. In this scenario emerging from variational clus…