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Spectral weight function for the half-filled hubbard-model - a singular-value decomposition approach



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Creffield, Charles E. and Klepfish,, E.G. and Pike, E. R. and Sarkar, Sarben (1995) Spectral weight function for the half-filled hubbard-model - a singular-value decomposition approach. Physical review letters, 75 (3). pp. 517-520. ISSN 0031-9007


Official URL: http://dx.doi.org/10.1103/PhysRevLett.75.517



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, pi), (pi, 0) points in the Brillouin zone, in accordance with experimental data for high-temperature superconducting compounds.

Item Type:Article
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© 1995 The American Physical Society.
We thank J. Jefferson, A. Bratkovsky, D. Edwards, D. Sivia, and P. Kornilovitch for stimulating discussions. This work was supported by SERC Grant NO. GR/JI8675 and our general development of SVD techniques by the U.S. Army Research ONce, Agreement No. DAAL03-92- G-0142.

Uncontrolled Keywords:Exponential relaxation rates; Laplace transform Inversion; Dilationally invariant transforms; System-analysis; Sampling method; Discrete-data; Resolution; Recovery
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:42568
Deposited On:18 May 2017 18:39
Last Modified:18 May 2017 18:39

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