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

Author

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  • A. Pérez-Romero

    (Universidad Nacional de Colombia)

  • R. Franco

    (Universidad Nacional de Colombia)

  • J. Silva-Valencia

    (Universidad Nacional de Colombia)

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

Suggested Citation

  • A. Pérez-Romero & R. Franco & J. Silva-Valencia, 2021. "Phase diagram of the SU(3) Fermi–Hubbard model with next-neighbor interactions," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 94(11), pages 1-10, November.
    • Handle: RePEc:spr:eurphb:v:94:y:2021:i:11:d:10.1140_epjb_s10051-021-00242-4
    DOI: 10.1140/epjb/s10051-021-00242-4
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