摘要
The necessary conditions for the presence of heavy electrons in metals and compounds,which contain local f electrons,are analyzed with an emphasis on the magnetically ordered materials.A self-consistent treatment on the Periodic Anderson Hamiltonian shows that there is a sharp change in the effective mass(therefore the density of states)while the virtual bound level crosses the Fermi level;meantime a transition between magnetic and nonmagnetic or/and between different magnetic states may concomitantly occur.Numerical calculation has been carried out and some typical results are shown.
作者
陈长风
章立源
CHEN Changfeng;ZHANG Liyuan(Institute of solid State Physics,Department of Physics,Peking University,Beijing)
