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A theorem on the particle number and density of states in the Kondo problem (1969)

Keiter, H. ; Müller-Hartmann, E. ; Zittartz, J.

Springer

The European physical journal 223 (1969), S. 48-53

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ISSN: 1434-601X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract A theorem is derived for the Kondo model describing the interaction of conduction electrons with a localized magnetic impurity. The theorem states that the model preserves exact particle-hole symmetry. This implies that for fixed chemical potential the average particle number is unchanged as compared to the noninteracting case independent of temperature and applied magnetic field. The consequences of the symmetry property for the one particle density of states are also investigated. Finally the theorem proves to be a useful tool to check current approximate theories of the Kondo effect on their validity.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01408712

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