Fermionic functional renormalization group for first-order phase transitions: a mean-field model

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dc.creatorGersch, R.
dc.creatorReiss, J.
dc.creatorHonerkamp, C.
dc.date2006-09-20
dc.date2007-02-08
dc.date.accessioned2026-07-07T07:45:13Z
dc.date.available2026-07-07T07:45:13Z
dc.descriptionFirst-order phase transitions in many-fermion systems are not detected in the susceptibility analysis of common renormalization-group (RG) approaches. Here we introduce a counterterm technique within the functional renormalization-group (fRG) formalism which allows access to all stable and metastable configurations. It becomes possible to study symmetry-broken states which occur through first-order transitions as well as hysteresis phenomena. For continuous transitions, the standard results are reproduced. As an example, we study discrete-symmetry breaking in a mean-field model for a commensurate charge-density wave. An additional benefit of the approach is that away from the critical temperature for the breaking of discrete symmetries large interactions can be avoided at all RG scales.
dc.description17 pages, 8 figures. v2 corrects typos, adds references and a discussion of the literature
dc.identifierhttps://arxiv.org/abs/cond-mat/0609520
dc.identifierhttp://arxiv.org/abs/cond-mat/0609520
dc.identifierNew Journal of Physics 8, 320 (2006)
dc.identifierdoi:10.1088/1367-2630/8/12/320
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/123460
dc.subjectStrongly Correlated Electrons
dc.titleFermionic functional renormalization group for first-order phase transitions: a mean-field model
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