Absence of superconductivity in the repulsive Hubbard model on a square lattice in the regime of strong coupling
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DOI: 10.1088/1402-4896/ac03e2
Abstract: The possibility of the superconducting transition in the repulsive Hubbard model on a square lattice is studied using the ladder approximation of the strong coupling diagram technique. The t–U and t–t′–t″–U models are considered in… read more here.
Keywords: hubbard model; strong coupling; model square; repulsive hubbard ... See more keywords
Temperature and doping induced instabilities of the repulsive Hubbard model on the Lieb lattice
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DOI: 10.1103/physrevb.96.245127
Abstract: The properties of a phase at finite interactions can be significantly influenced by the underlying dispersion of the non-interacting Hamiltonian. We demonstrate this by studying the repulsive Hubbard model on the $2$D Lieb lattice, which… read more here.
Keywords: hubbard model; temperature; model lieb; repulsive hubbard ... See more keywords