Emergence of diverse array of phases in an exactly solvable model

2023/10/31 by Zhipeng Sun, Sun, Zhi-Peng, Hai-Qing Lin +1 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Physical and Chemical Molecular Interactions #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.2310.20306

openalex publication_date 2023/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose an exactly solvable lattice model, motivated by the significance of the extended Hubbard model (t-U-V model) and inspired by the work of Hatsugai and Kohmoto. The ground state exhibits a diverse array of phases, including the charge-4e condensed phase, the charge-2e superconducting phase, the half-filled insulating phase, the quarter-filled insulating phase, the metallic phase, and an unconventional metallic phase. Among them, the unconventional metallic phase could be of particular significance, for the coexistence of electrons and pairs at zero energy. These findings are poised to advance our understanding and exploration of strongly correlated physics.

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• Emergence of charge-4e superconductivity from 2D nematic superconductors

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