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Published in 2021 at "Physica Scripta"
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…
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Keywords:
hubbard model;
strong coupling;
model square;
repulsive hubbard ... See more keywords
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1
Published in 2017 at "Physical Review B"
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…
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Keywords:
hubbard model;
temperature;
model lieb;
repulsive hubbard ... See more keywords