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Infinite U d , U p ground state of the extended Hubbard model

1990; American Physical Society; Volume: 41; Issue: 4 Linguagem: Inglês

10.1103/physrevb.41.2557

1095-3795

R. J. Gooding, Veit Elser,

Quantum and electron transport phenomena

The renormalization of the extended Hubbard model proposed by Zhang and Rice [Phys. Rev. B 37, 3759 (1988)] that leads to the (nearest-neighbor-only) t-J model is scrutinized in the infinite correlation limit. We demonstrate that the ${U}_{d}$,${U}_{p}$\ensuremath{\rightarrow}\ensuremath{\infty} limit obtained from the extended Hubbard model does not have the same ground state as the U\ensuremath{\rightarrow}\ensuremath{\infty} extrapolation of the t-J model.