6 papers
Unconventional plasmon dynamics due to strong correlations in SrRuO
Juraj Krsnik, Dino Novko, Fabian B. Kugler +2
Plasmon modes, their dispersion, and the onset of damping when approaching the electron-hole continuum are well understood when electron correlations are weak. However, we know lit…
Polaron formation as the vertex function problem: From Dyck's paths to self-energy Feynman diagrams
Tomislav MiÅ¡kiÄ, Juraj Krsnik, Stefano Ragni +2
We present an iterative method for generating the complete set of self-energy Feynman diagrams at arbitrary order for the single-polaron problem with arbitrary linear coupling to t…
Entanglement in the pseudogap regime of cuprate superconductors
Frederic Bippus, Juraj Krsnik, Motoharu Kitatani +4
We find a strongly enhanced entanglement within the pseudogap regime of the Hubbard model. This entanglement is estimated from the quantum Fisher information and, avoiding the ill-…
Analytical expression for -ton vertex contributions to the optical conductivity
Juraj Krsnik, Anna Kauch, Karsten Held
Vertex corrections from the transversal particle-hole channel, so-called -tons, are generic in models for strongly correlated electron systems and can lead to a displaced Drude…
Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
Liang Si, Eric Jacob, Wenfeng Wu +6
Conflicting theoretical scenarios for infinite-layer nickelate superconductors have been hotly debated, particularly regarding whether {only} a single Ni-3 band is rel…
Local correlations necessitate waterfalls as a connection between quasiparticle band and developing Hubbard bands
Juraj Krsnik, Karsten Held
Waterfalls are anomalies in the angle-resolved photoemission spectrum where the energy-momentum dispersion is almost vertical, and the spectrum strongly smeared out. These anomalie…