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
收藏
页码：13156 / 13159
页数：4
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