Magnetic properties of the Anderson model: A local moment approach
University of Oxford, Physical and
Theoretical Chemistry South Parks Road,
Oxford OX1 3QZ, UK
Accepted: 2 February 2001
We develop a local moment approach to static properties of the symmetric Anderson model in the presence of a magnetic field, focussing in particular on the strong-coupling Kondo regime. The approach is innately simple and physically transparent; but is found to give good agreement, for essentially all field strengths, with exact results for the Wilson ratio, impurity magnetization, spin susceptibility and related properties.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions
© EDP Sciences, 2001