Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 94: Correlated Magnetism – Low-Dimensional Systems
TT 94.1: Vortrag
Freitag, 13. März 2026, 09:30–09:45, HSZ/0101
The zoo of states in the 2 dimensional Hubbard model — •Robin Scholle1, Pietro Bonetti1,2, Demetrio Vilardi1, and Walter Metzner1 — 1Max Planck Institute for Solid State Research, 70569 Stuttgart — 2Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
We use real-space Hartree-Fock theory to construct a magnetic phase diagram of the two-dimensional Hubbard model as a function of temperature and doping. We are able to detect various spin- and charge order patterns including Néel, stripe and spiral order without biasing the system towards one of them. For an intermediate interaction strength we predominatly find Néel order close to half-filling, stripe order for low temperatures or large doping, and an intermediate region of spiral order. We then combine the approach with the functional renormalization group method and are able to access the superconducting regime. I will give a short summary of the method followed by a presentation of our current results and an outlook for possible further applications.
Keywords: Hubbard; magnetism; stripe; superconductivity; phase transition