SPECTRAL-FUNCTION OF A HOLE IN THE T-J MODEL

被引:85
作者
LIU, ZP [1 ]
MANOUSAKIS, E [1 ]
机构
[1] FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 05期
关键词
D O I
10.1103/PhysRevB.44.2414
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We give numerical solutions, on finite but large-size square lattices, of the equation for the single-hole Green's function obtained by the self-consistent approach of Schmitt-Rink et al. and Kane et al. The spectral function of the hole in a quantum antiferromagnet shows that most features describing the hole motion are in close agreement with the results of the exact diagonalization on the 4(2) lattice in the region of J/t less-than-or-equal-to 0.2. Our results obtained on sufficiently large-size lattices suggest that certain important features of the spectral function survive in the thermodynamic limit while others change due to finite-size effects. We find that the leading nonzero vertex correction is given by a two-loop diagram, which has a small contribution.
引用
收藏
页码:2414 / 2417
页数:4
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