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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. y Klepfish, E. G. y Pike, E. R. y 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

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


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http://journals.aps.org/Editorial


Resumen

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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© 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.

Palabras clave:Exponential relaxation rates; Laplace transform inversion; Dilationally invariant transforms; System-analysis; Sampling method; Discrete-data; Resolution; Recovery
Materias:Ciencias > Física > Física de materiales
Código ID:37475
Depositado:28 Abr 2016 18:14
Última Modificación:28 Abr 2016 18:14

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