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- Anderson_impurity_model abstract "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 formwhere the operator corresponds to the annihilation operator of an impurity, and corresponds to a conduction electron annihilation operator, and labels the spin. The onsite Coulomb repulsion is , which is usually the dominant energy scale, and is the hopping strength from site to site . A significant feature of this model is the hybridization term , which allows the electrons in heavy fermion systems to become mobile, despite the fact they are separated by a distance greater than the Hill limit.In heavy-fermion systems, we find we have a lattice of impurities. The relevant model is then the periodic Anderson model.There are other variants of the Anderson model, for instance the SU(4) Anderson model, which is used to describe impurities which have an orbital, as well as a spin, degree of freedom. This is relevant in carbon nanotube quantum dot systems. The SU(4) Anderson model Hamiltonian iswhere i and i' label the orbital degree of freedom (which can take one of two values), and n represents a number operator.".
- Anderson_impurity_model wikiPageExternalLink PhysRev.124.41.
- Anderson_impurity_model wikiPageID "12305030".
- Anderson_impurity_model wikiPageRevisionID "586818085".
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- Anderson_impurity_model subject Category:Condensed_matter_physics.
- Anderson_impurity_model subject Category:Quantum_Lattice_models.
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- Anderson_impurity_model comment "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.".
- Anderson_impurity_model label "Anderson impurity model".
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- Anderson_impurity_model label "安德森模型".
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