A NEW METHOD FOR THE EXCITATIONS OF THE ONE-DIMENSIONAL HUBBARD-MODEL

被引：27
|
作者：
KLUMPER, A
SCHADSCHNEIDER, A
ZITTARTZ, J
机构：
[1] Institut für Theoretische Physik, Universität zu Köln, Köln 41, D-5000
来源：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 78卷 / 01期
关键词：
D O I：
10.1007/BF01317362
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We present a new method to solve the nested Bethe Ansatz equations for the one-dimensional Hubbard model. First the "spin problem" is solved completely by using inversion/functional relations and an equivalence to the eight-vertex model. Secondly we solve the "electronic problem", i.e. we determine the ground state of the half-filled band and all finite energy excitations relative to this case. Apart from the calculation of the energy bands we also derive basic equations for the characteristic parameters which determine the excited states. © 1990 Springer-Verlag.
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页码：99 / 109
页数：11
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