Phase diagram of the SU(3) Fermi–Hubbard model with next-neighbor interactions

A. Pérez-Romero, R. Franco and J. Silva-Valencia ()
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A. Pérez-Romero: Universidad Nacional de Colombia
R. Franco: Universidad Nacional de Colombia
J. Silva-Valencia: Universidad Nacional de Colombia

The European Physical Journal B: Condensed Matter and Complex Systems, 2021, vol. 94, issue 11, 1-10

Abstract: Abstract 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. Graphic abstract

Date: 2021
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DOI: 10.1140/epjb/s10051-021-00242-4

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