59 citations · 241 across the 25 of their papers we have counts for
27 papers
Fermion quartets on the square lattice
Dionys Baeriswyl, Francesco Petocchi, Philipp Werner
We study a microscopic model for four spinless fermions on the square lattice which exhibits a quartet bound state in the strong coupling regime. The four-particle quantum states a…
Infrared ellipsometry study of the charge dynamics in K3p-terphenyl
Qi He, P. Marsik, F. Le Mardelé +8
We report an infrared ellipsometry study of the charge carrier dynamics in polycrystalline Kxp-terphenyl samples with nominal , for which signatures of high-temperature superc…
Frustrated mixed-spin ladders: Evidence for a bond order wave phase between rung-singlet and Haldane phases
N. Ahmadi, J. Abouie, R. Haghshenas +1
In frustrated spin ladders the interplay of frustration and correlations leads to the familiar Haldane (H) and rung-singlet (RS) phases. The nature of the transition between these…
Topological and non-topological features of generalized Su-Schrieffer-Heeger models
N. Ahmadi, J. Abouie, D. Baeriswyl
The (one-dimensional) Su-Schrieffer-Heeger Hamiltonian, augmented by spin-orbit coupling and longer-range hopping, is studied at half filling for an even number of sites. The groun…
Superconductivity from repulsion: Variational results for the 2D Hubbard model in the limit of weak interaction
Dionys Baeriswyl
The two-dimensional Hubbard model is studied for small values of the interaction strength (U of the order of the hopping amplitude t), using a variational ansatz well suited for th…
Mass-Imbalanced Ionic Hubbard Chain
Michael Sekania, Dionys Baeriswyl, Luka Jibuti +1
A repulsive Hubbard model with both spin-asymmetric hopping () and a staggered potential (of strength ) is studied in one dimension. The model is…