Spectral Properties and New Interpolating Solution of Anderson Model

• Authors: A. Kuzemsky
• Languages of publication: EN

Abstracts

EN

A new approach to many-body quasiparticle dynamics of the Anderson impurity model at finite temperatures is proposed in the framework of the equation-of-motion method. We find a new exact identity, which relates the one-particle and many-particle Green functions. Using this identity, it is shown that a new interpolating approximation for the one-particle Green function can be constructed. The approximation which simultaneously reproduces the weak-coupling limit and the strong coupling limit can be formulated self-consistently. This approach offers a new method for a systematic construction of the approximate interpolating dynamical solutions of strongly correlated electron models.

Keywords

EN

67.40.Db; 71.28.+d; 75.20.Hr

Discipline

• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)
• 71.28.+d: Narrow-band systems; intermediate-valence solids(for magnetic aspects, see 75.20.Hr and 75.30.Mb in magnetic properties and materials)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 2
• Pages: 355-358

Dates

published

1997-08

Contributors

author

A. Kuzemsky

• Bogolubov Theoretical Laboratory, Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia

Identifiers

DOI

10.12693/APhysPolA.92.355