SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 43: Poster: Correlated Electrons II

TT 43.19: Poster

Mittwoch, 29. März 2023, 15:00–18:00, P2/OG3

Phase diagram of the SU(3) Fermi-Hubbard model with next-neighbor interactions — •Arturo Pérez Romero^1,2, Jereson Silva Valencia², and Roberto Franco Peñaloza² — ¹Institut for Theoretical Physics, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany — ²Departamento de Física, Universidad Nacional de Colombia, A. A. 5997 Bogotá, Colombia.

We explore the zero-temperature phase diagram of a one-dimensional gas composed of three-color fermions, which interact locally and with their next neighbors. Using the density matrix renormalization group method and considering one-third filling, we characterize the ground state for several values of the parameters, finding diverse phases, namely: phase separation, spin density wave, pairing phase, a metallic phase, two different charge-density waves, and a non-separable state with modulation of charge. We show that the von Neumann block entropy and the fidelity susceptibility are useful for estimating the borders between the phases.