Precursor of antiferromagnetic bands in the half-filled two-dimensional Hubbard model

被引：1
|
作者：
Kyung, B [1 ]
机构：
[1] Max Planck Inst Phys Complex Syst, D-01187 Dresden, Germany
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1999年 / 13卷 / 27期
关键词：
D O I：
10.1142/S0217979299002940
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the half-filled two-dimensional Hubbard model in the intermediate coupling regime. As temperature is decreased for a two-dimensional half-filled band, two-dimensional critical fluctuations give rise to a strong local maximum in \Im Sigma(k(F), omega)\ at omega = 0, leading to a split peak with a pseudogap inside in the spectral function and the density of states. The calculated energy dispersion is in good agreement with that of spin density wave approximation.
引用
收藏
页码：3183 / 3192
页数：10
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