Publications (39)
Frequency-dependent local interactions and low-energy effective models from electronic structure calculations
F. Aryasetiawan, M. Imada, A. Georges +3
We propose a systematic procedure for constructing effective models of strongly correlated materials. The parameters, in particular the on-site screened Coulomb interaction U, are…
Low-energy models for correlated materials: bandwidth renormalization from Coulombic screening
M. Casula, Ph. Werner, L. Vaugier +3
We provide a prescription for constructing Hamiltonians representing the low energy physics of correlated electron materials with dynamically screened Coulomb interactions. The key…
Observation of Hubbard Bands in -Manganese
S. Biermann, A. Dallmeyer, C. Carbone +5
We present angle-resolved photoemission spectra of the -phase of manganese as well as a theoretical analysis using a recently developed approach that combines density functiona…
Deconfinement transition and Luttinger to Fermi Liquid crossover in quasi one-dimensional systems
S. Biermann, A. Georges, A. Lichtenstein +1
We investigate a system of one dimensional Hubbard chains of interacting fermions coupled by inter-chain hopping. Using a generalization of the Dynamical Mean Field Theory we study…
Competition between Electron-Phonon coupling and Spin Fluctuations in superconducting hole-doped BiOCuS
L. Ortenzi, S. Biermann, O. K. Andersen +2
BiOCuS is a band insulator that becomes metallic upon hole doping. Superconductivity was recently reported in doped BiOCuS and attributed to spin fluctuations as a pairing…
Local moment versus Kondo behavior of the 4f-electrons in rare-earth iron oxypnictides
L. Pourovskii, V. Vildosola, S. Biermann +1
We consider the role played by the 4f states in the rare-earth oxyarsenides REOFeAs (RE=Ce,Pr,Nd) and the oxyphosphate CeOFeP, using a first-principles technique that combines the…