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Spectral scaling and quantum critical behaviour in the pseudogap Anderson model

Abstract:

The pseudogap Anderson impurity model provides a classic example of an essentially local quantum phase transition. Here we study its single-particle dynamics in the vicinity of the symmetric quantum critical point (QCP) separating generalized Fermi-liquid and local-moment phases, via the local-moment approach. Both phases are shown to be characterized by a low-energy scale that vanishes at the QCP; and the universal scaling spectra, on all energy scales, are obtained analytically. The spectru...

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Publication status:
Published

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Publisher copy:
10.1209/epl/i2003-00306-3

Authors


Glossop, MT More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Journal:
EUROPHYSICS LETTERS
Volume:
61
Issue:
6
Pages:
810-816
Publication date:
2003-03-05
DOI:
EISSN:
1286-4854
ISSN:
0295-5075
URN:
uuid:ae0b8474-28fa-4eeb-b5cc-0b85a3501c9e
Source identifiers:
38619
Local pid:
pubs:38619
Language:
English

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