Spectral scaling and quantum critical behaviour in the pseudogap Anderson model
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-momen...
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| Format: | Journal article |
| Language: | English |
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2003
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| _version_ | 1826290961299275776 |
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| author | Glossop, M Logan, D |
| author_facet | Glossop, M Logan, D |
| author_sort | Glossop, M |
| collection | OXFORD |
| description | 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 spectrum precisely at the QCP is also obtained; its form showing clearly the non-Fermi-liquid, interacting nature of the fixed point. |
| first_indexed | 2024-03-07T02:52:12Z |
| format | Journal article |
| id | oxford-uuid:ae0b8474-28fa-4eeb-b5cc-0b85a3501c9e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:52:12Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | oxford-uuid:ae0b8474-28fa-4eeb-b5cc-0b85a3501c9e2022-03-27T03:39:59ZSpectral scaling and quantum critical behaviour in the pseudogap Anderson modelJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ae0b8474-28fa-4eeb-b5cc-0b85a3501c9eEnglishSymplectic Elements at Oxford2003Glossop, MLogan, DThe 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 spectrum precisely at the QCP is also obtained; its form showing clearly the non-Fermi-liquid, interacting nature of the fixed point. |
| spellingShingle | Glossop, M Logan, D Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title | Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title_full | Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title_fullStr | Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title_full_unstemmed | Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title_short | Spectral scaling and quantum critical behaviour in the pseudogap Anderson model |
| title_sort | spectral scaling and quantum critical behaviour in the pseudogap anderson model |
| work_keys_str_mv | AT glossopm spectralscalingandquantumcriticalbehaviourinthepseudogapandersonmodel AT logand spectralscalingandquantumcriticalbehaviourinthepseudogapandersonmodel |