Non-Fermi Behavior of the Strongly Correlated Electron Systems

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dc.creatorMoca, Catalin Pascu
dc.date1999-11-21
dc.date.accessioned2026-07-07T03:15:14Z
dc.date.available2026-07-07T03:15:14Z
dc.description(1) The temperature dependence of the specific heat for a marginal Fermi liquid has been calculated. (2) We calculated the self-energy at T=0 for a two dimensional fermionic system with hyperbolic dispersion. The existence of the saddle points in the energy gives rise to a marginal behavior. (3) We showed that the two-dimensional fermionic system with the energy $ε_{\mathbf{k}}=k_xk_y$ has a non-Fermi behavior. (4) The electronic self-energy due to the electron-spin interaction is calculated for a two dimensional system. (5) We study the influence of the amplitude fluctuations of a non-Fermi superconductor on the energy spectrum of the two-dimensional Anderson non-Fermi system. (6) Using the field-theoretical methods we studied the evolution from BCS theory to Bose-Einstein condensation (BEC) for a non-Fermi system. (7) Using the renormalization group approach proposed by Millis we calculated the specific heat coefficient $γ(T)$ for the magnetic fluctuations with susceptibility $χ^{-1}\sim δ^α+| ω| ^α+f(q)$ near a Lifshitz point.
dc.descriptionPh.D. Thesis, 61 pages, Latex
dc.identifierhttps://arxiv.org/abs/cond-mat/9911330
dc.identifierhttp://arxiv.org/abs/cond-mat/9911330
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29954
dc.subjectCondensed Matter
dc.titleNon-Fermi Behavior of the Strongly Correlated Electron Systems
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