![]()
出典:Wikipedia
出典:『Wikipedia』 (2011/05/19 13:39 UTC 版)
The Anderson Impurity Model is a Hamiltonian model that is often used to describe heavy fermion systems and Kondo insulators. The model contains a narrow resonance between a magnetic impurity state and a conduction electron state. The model also contains an on-site repulsion term as found in the Hubbard model between localized electrons. For a single impurity, the Hamiltonian takes the form