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New Exactly Solvable Model of Strongly Correlated Electrons Motivated by High T_c Superconductivity

Fabian H. L. Essler·Vladimir E. Korepin·Kareljan Schoutens
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Abstract

We present a new model describing strongly correlated electrons on a general $d$-dimensional lattice. It differs from the Hubbard model by interactions of nearest neighbours, and it contains the $t$-$J$ model as a special case. The model naturally describes local electron pairs, which can move coherently at arbitrary momentum. By using an $η$-pairing mechanism we can construct eigenstates of the hamiltonian with off-diagonal-long-range-order (ODLRO). These might help to relate the model to high-$T_c$ superconductivity. On a one-dimensional lattice, the model is exactly solvable by Bethe Ansatz.

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Fabian H. L. Essler, Vladimir E. Korepin, Kareljan Schoutens. 1992-09-03. New Exactly Solvable Model of Strongly Correlated Electrons Motivated by High T_c Superconductivity. https://doi.org/10.1103/physrevlett.68.2960

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