Fermi and non-Fermi Liquid Behavior in Quantum Impurity Systems: Conserving Auxiliary Particle Theory
| dc.creator | Kroha, J. | |
| dc.creator | Wölfle, P. | |
| dc.date | 2000-07-06 | |
| dc.date.accessioned | 2026-07-25T21:37:26Z | |
| dc.description | We review a recently developed method, based on an exact auxiliary boson representation, to describe both Fermi liquid and non-Fermi liquid behavior in quantum impurity systems. Coherent spin and charge fluctuation processes are taken into account in a self-consistent way and are shown to include {\it all} leading and subleading infrared singularities at any given order of the self-consistent loop expansion of the free energy. As a consequence, for the SU(N)$\times$ SU(M) Anderson impurity models the correct temperature dependence of the susceptibility is recovered over the entire temperature range, including Fermi liquid or non-Fermi liquid behavior below the Kondo temperature $T_K$. As a standard diagram technique the presented method has the potential to be generalized to correlated electron systems on a lattice. | |
| dc.description | Invited talk, March meeting of the German Physical Society, 1999, 10 pages, 5 figures, style file included | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0007103 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0007103 | |
| dc.identifier | Adv. Solid State Phys. 39, 271 (1999) | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/81282 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Fermi and non-Fermi Liquid Behavior in Quantum Impurity Systems: Conserving Auxiliary Particle Theory | |
| dc.type | text |