ar X iv : c on d - m at / 9 50 11 19 v 1 2 5 Ja n 19 95 Spectral weight function for the half - filled Hubbard model : a singular value decomposition approach

نویسنده

  • Sarben Sarkar
چکیده

The singular value decomposition technique is used to reconstruct the electronic spectral weight function for a half-filled Hubbard model with on-site repulsion U = 4t from Quantum Monte Carlo data. A two-band structure for the single-particle excitation spectrum is found to persist as the lattice size exceeds the spin-spin correlation length. The observed bands are flat in the vicinity of the (0, π), (π, 0) points in the Brillouin zone, in accordance with experimental data for high-temperature superconducting compounds.

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Spectral weight function for the half-filled Hubbard model: A singular value decomposition approach.

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تاریخ انتشار 1995