SPECTRAL WEIGHT FUNCTION FOR THE HALF-FILLED HUBBARD-MODEL - A SINGULAR-VALUE DECOMPOSITION APPROACH

被引：52
作者：
CREFFIELD, CE
KLEPFISH, EG
PIKE, ER
SARKAR, S
机构：
[1] Department of Physics, King's College London, London WC2R 2LS, Strand
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.75.517
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页码：517 / 520
页数：4
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