Critical properties of the Fermi-Bose Kondo and pseudogap Kondo models: Renormalized perturbation theory
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Magnetic impurities coupled to both fermionic and bosonic baths or to a fermionic bath with pseudogap density of states, described by the Fermi-Bose Kondo and pseudogap Kondo models, display nontrivial intermediate-coupling fixed points associated with critical local-moment fluctuations and local non-Fermi liquid behavior. Based on renormalization group together with a renormalized perturbation expansion around the free-impurity limit, we calculate various impurity properties in the vicinity of those intermediate-coupling fixed points. In particular, we compute the conduction electron T matrix, the impurity susceptibility, and the residual impurity entropy, and relate our findings to certain scenarios of local quantum criticality in strongly correlated lattice models.
Details
Originalsprache | Englisch |
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Aufsatznummer | 174421 |
Seiten (von - bis) | 174421-1-174421-16 |
Fachzeitschrift | Physical Review B - Condensed Matter and Materials Physics |
Jahrgang | 69 |
Ausgabenummer | 17 |
Publikationsstatus | Veröffentlicht - Mai 2004 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |