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

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

1992-09-03

arxiv.org/abs/cond-mat/9209002v1

Phys.Rev.Lett.68:2960-2963,1992

Physics

Condensed Matter

10 pages, using latex, Phys.Rev.Lett. 68 (1992) 2960

Scientific paper

10.1103/PhysRevLett.68.2960

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 $\eta$-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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