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Incoherent Spectral Weight Emerging from a Van Hove Singularity in a Kagome Metal
C. -y. Lim, J. Deng, A. Korshunov +14
Waterfall-like spectral features observed by angle-resolved photoemission spectroscopy (ARPES) are commonly associated with strong electronic correlations or electron-boson couplin…
Many-Body Superconductivity in Topological Flat Bands
Jonah Herzog-Arbeitman, Aaron Chew, Kukka-Emilia Huhtinen +2
In a flat band superconductor, bosonic excitations can disperse while unpaired electrons are immobile. To study this strongly interacting system, we construct a family of multi-ban…
Insulator-pseudogap crossover in the Lieb lattice
Kukka-Emilia Huhtinen, Päivi Törmä
We study the attractive Hubbard model in the Lieb lattice to understand the normal state above the superconducting critical temperature in a flat band system. We use cluster dynami…
A dynamical mean-field theory study of stripe order and d-wave superconductivity in the two-dimensional Hubbard model
Tuomas I. Vanhala, Päivi Törmä
We use cellular dynamical mean-field theory with extended unit cells to study the ground state of the two-dimensional repulsive Hubbard model at finite doping. We calculate the ene…
Strongly interacting Fermi gases with density imbalance
J. Kinnunen, L. M. Jensen, P. Torma
We consider density-imbalanced Fermi gases of atoms in the strongly interacting, i.e. unitarity, regime. The Bogoliubov-deGennes equations for a trapped superfluid are solved. They…