Gap in the spin excitations and magnetization curve of the one-dimensional attractive Hubbard model.
Gap in the spin excitations and magnetization curve of the one-dimensional attractive Hubbard model.
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DOI：
10.1103/physrevb.33.2114
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发表时间：
1986-02
期刊：
影响因子：
--
通讯作者：
Bahder;Woynarovich
中科院分区：
文献类型：
--
作者：
Bahder;Woynarovich
研究了在位吸引Hubbard链的磁性随能带填充的变化。磁化曲线数值计算的相互作用和带填充的几个值。这些曲线的一个意想不到的特点是，磁化率总是有限的，除了空带和半满带。磁激发谱中的差距也被计算为带填充的函数。数值结果与分析结果进行了比较，这是获得的近空和近半满带。
The magnetic properties of a Hubbard chain with on-site attraction are studied as a function of the band filling. Magnetization curves are calculated numerically for several values of the interaction and band filling. An unexpected feature of these curves is that the susceptibility is always finite except for the empty and half-filled band. The gap in the magnetic excitation spectrum is also calculated as a function of the band filling. The numerical results are compared with analytical results, which are obtained for the nearly empty and nearly-half-filled band.