SPIN-CHARGE DECOUPLING AND THE GREENS-FUNCTION OF ONE-DIMENSIONAL MOTT INSULATORS

被引：40

作者：

PAROLA, A

SORELLA, S

机构：

[1] SWISS FED INST TECHNOL,CH-8093 ZURICH,SWITZERLAND

[2] SCUOLA INT SUPER STUDI AVANZATI,I-34014 TRIESTE,ITALY

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.45.13156

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An exact expression for the Green's function G(k,omega) of one hole in the U --> infinity one-dimensional Hubbard model is derived from the known Bethe-ansatz solution of the model. Due to the spin-charge decoupling of the one-hole excitation spectrum and the Fermi-like statistics of the spin excitations, G shows branch-cut singularities at omega=+/-2 sink and a nontrivial dependence on the momentum of the hole. As a result, the hole can propagate although the quasiparticle weight vanishes.

引用

页码：13156 / 13159

页数：4

共 14 条

[1]

[Anonymous], UNPUB

[2] SINGLE-PARTICLE EXCITATIONS IN MAGNETIC INSULATORS [J].