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Magnetic impurities in gapless Fermi systems: perturbation theory

Abstract:

We consider a symmetric Anderson impurity model with a soft-gap hybridization vanishing at the Fermi level, ΔI ∝ |ω|r with r > 0. Three facets of the problem are examined. First the non-interacting limit, which despite its simplicity contains much physics relevant to the U > 0 case: it exhibits both strong coupling (SC) states (for r < 1) and local moment states (for r > 1), with characteristic signatures in both spectral properties and thermodynamic functions. Second, we establis...

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Publication status:
Published

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Publisher copy:
10.1007/s100510050063

Authors


Glossop, MT More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Journal:
EUROPEAN PHYSICAL JOURNAL B
Volume:
13
Issue:
3
Pages:
513-525
Publication date:
2000-02-05
DOI:
ISSN:
1434-6028
URN:
uuid:ecd1e398-3118-4564-a888-2eaea3844043
Source identifiers:
37355
Local pid:
pubs:37355

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