Quasiparticle band in the frustrated t-t'-J model

被引：5

作者：

Bala, J ^{[1
]}

Oles, AM ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.54.3495

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the influence of frustration on the quasiparticle dispersion in the t-J and t-t'-J models using the linear spin-wave theory and self-consistent Born approximation. The next-neighbor antiferromagnetic interactions, simulating the effect of doping within CuO2 planes of high-T-c superconductors, lead to a drastic reduction of the quasiparticle bandwidth with the increasing frustration in a wide range of t, t', and J parameters. The low-energy quasiparticle band (with the width only similar to 0.3 eV) obtained for the realistic values of parameters and a very weak quasiparticle state at the (0,0) point in the Brillouin zone agree quite well with the flat band observed at the Fermi level in the angle-resolved photoemission experiments for Bi2Sr2CaCu2O8+delta.

引用

页码：3495 / 3498

页数：4

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