RT Journal Article
T1 Spectral weight function for the half-filled hubbard-model - a singular-value decomposition approach
A1 Creffield, Charles
A1 Klepfish, , E.G.
A1 Pike, E. R.
A1 Sarkar, Sarben
AB 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.
PB American Physical Society
SN 0031-9007
YR 1995
FD 1995-07-17
LK https://hdl.handle.net/20.500.14352/60125
UL https://hdl.handle.net/20.500.14352/60125
LA eng
NO © 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.
NO SERC
DS Docta Complutense
RD 8 abr 2025