Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/15364
Tipo do documento: Artigo
Título: Complete renormalization group calculation up to two-loop order of an effective two-band model for iron-based superconductors
Autor: Carvalho, Vanuildo Silva de
Silva, Hermann Freire Ferreira Lima e
Abstract: We perform a renormalization group (RG) study up to two-loop order of an effective low-energy two-band model to describe some of the recently discovered iron-based superconductors. Our starting point is the itinerant electronic model proposed by Chubukov et al.(Phys. Rev. B, 78 (2008) 134512), which displays two small, almost nested Fermi pockets with one hole pocket centered at (0,0) and one electron pocket centered at Q =(π, π) in the folded Brillouin zone. We then proceed to implement a complete two-loop RG calculation for this model of four-point vertex corrections, quasiparticle weight and several order parameter susceptibilities in order to evaluate the robustness of one-loop RG results available in the literature with respect to including self-energy effects and higher-order quantum fluctuations.
Palavras-chave: Nonconventional mechanisms
Theories of superconducting state
Model of superconducting state
Strongly correlated electron systems
Heavy fermions
País: Franca
Unidade acadêmica: Instituto de Física - IF (RG)
Citação: CARVALHO, V. S. de; FREIRE, H. Complete renormalization group calculation up to two-loop order of an effective two-band model for iron-based superconductors. Europhysics Letters, Mulhouse, v. 96, e17006, 2011.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1209/0295-5075/96/17006
Identificador do documento: 10.1209/0295-5075/96/17006
URI: http://repositorio.bc.ufg.br/handle/ri/15364
Data de publicação: 2011
Aparece nas coleções:IF - Artigos publicados em periódicos

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