Spin and Charge Structure Factor of the 2-d Hubbard Model

Details Spin and Charge Structure Factor of the 2-d Hubbard Model Spin and Charge Structure Factor of the 2-d Hubbard Model

1997-05-09

arxiv.org/abs/cond-mat/9705088v1

Phys. Rev. B, 56 (1997) 10097

Physics

Condensed Matter

Strongly Correlated Electrons

18 pages, revtex, 13 postscript figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.56.10097

The spin and charge structure factors are calculated for the Hubbard model on the square lattice near half-filling using a spin-rotation invariant six-slave boson representation. The charge structure factor shows a broad maximum at the zone corner and is found to decrease monotonically with increasing interaction strength and electron density and increasing temperature. The spin structure factor develops with increasing interaction two incommensurate peaks at the zone boundary and along the zone diagonal. Comparison with results of Quantum Monte Carlo and variational calculations is carried out and the agreement is found to be good. The limitations of an RPA-type approach are pointed out.

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