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Tipo do documento: Artigo
Título: Breakdown of Fermi liquid behavior near the hot spots in a two-dimensional model: a two-loop renormalization group analysis
Autor: Carvalho, Vanuildo Silva de
Silva, Hermann Freire Ferreira Lima e
Abstract: Motivated by a recent experimental observation of a nodal liquid on both single crystals and thin films of Bi2Sr2CaCu2O8 + δ by Chatterjee et al. [Nature Phys. 6 (2010) 99], we perform a field-theoretical renormalization group (RG) analysis of a two-dimensional model such that only eight points located near the “hot spots” on the Fermi surface are retained, which are directly connected by spin density wave ordering wavevector. We derive RG equations up to two-loop order describing the flow of renormalized couplings, quasiparticle weight, several order-parameter response functions, and uniform spin and charge susceptibilities of the model. We find that while the order-parameter susceptibilities investigated here become non-divergent at two loops, the quasiparticle weight vanishes in the low-energy limit, indicating a breakdown of Fermi liquid behavior at this RG level. Moreover, both uniform spin and charge susceptibilities become suppressed in the scaling limit which indicate gap openings in both spin and charge excitation spectra of the model.
Palavras-chave: Field-theoretical renormalization group
Strongly correlated electronic systems
Non-fermi liquids
Two-dimensional fermionic models
País: Estados unidos
Unidade acadêmica: Instituto de Física - IF (RG)
Citação: CARVALHO, Vanuildo S. de; FREIRE, Hermann . Breakdown of Fermi liquid behavior near the hot spots in a two-dimensional model: a two-loop renormalization group analysis. Nuclear Physics. B, New York, v. 875, p. 738-756, 2013.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1016/j.nuclphysb.2013.07.016
Identificador do documento: 10.1016/j.nuclphysb.2013.07.016
Data de publicação: 2013
Aparece nas coleções:IF - Artigos publicados em periódicos

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