弱色散Kondo晶格模型

A KONDQ LATTICE MODEL WITH SMALL DISPERSION

从s—f交换模型出发,在f带中引入弱色散项,讨论了重费米子系统正常态的低温特性。文中应用自洽场近似计算了低温磁化率和低温电阻率,结果表明,弱色散Kondo晶格模型能够解释重费米子系统的低温反常现象。

The low temperature features of normal state heavy-fermion systems are discussed by introducing a small dispersion term to f-band in the s-f exchange model. The susceptibility and the resistivity at low temperatures are calculated with the mean field approximation. The results show that the low temperature abnormalities of heavy-fermion systems can be explained with the given model.