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, π), (π, 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/20.500.14352/59933
UL https://hdl.handle.net/20.500.14352/59933
LA eng
NO © 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 U.S. Army Research Office
NO Systems Engineering Research Center (SERC)
DS Docta Complutense
RD 11 may 2025