The ground state of the two-dimensional Hubbard model

Details The ground state of the two-dimensional Hubbard model The ground state of the two-dimensional Hubbard model

1999-09-06

arxiv.org/abs/cond-mat/9909074v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published in Proceedings of Strongly Correlated Electron System (SCES99)

Scientific paper

10.1016/S0921-4526(99)00875-3

We have studied the ground state of the two-dimensional Hubbard model by using the adaptive sampling quantum monte carlo method. We found enhancement of the d-wave correlation function, the spin gap and the coexistence of both the commensurate and incommensurate peaks in $S(\vec{q})$, which does not contradict a recent experimental finding that both the resonance peak and the incommensurate peaks reside in the same doping level of YBCO and BSCCO.

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