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- W2086738863 abstract "The standard description of metals is based on the Landau theory of Fermi systems (Fermi Liquid theory). This picture breaks down in one dimensional systems, which are instead described by the Luttinger Liquid theory. Actually, experimental evidence indicates that Fermi Liquid theory breaks down in a variety of physical systems, including superconducting cuprates. In the first part of this lecture we will consider the relevant problem of crossover from Luttinger to Fermi Liquid with increasing dimensionality, showing that the Fermi Liquid is stable with respect to residual scattering by regular (short range) interactions among quasiparticles in any d > 1. However singular interactions can modify these results and open the way to richer scenarios. Relevant cases of singular interactions concern: i) gauge theories introduced to describe the half-filled Landau level and spin liquids considered in the context of high Tc cuprates; ii) proximity to a quantum critical point which has been investigated as a source of nondashFermi Liquid behavior in both heavy fermion systems and cuprates. Even though the theory of nondashFermi Liquid in d > 1 is hindered by the lack of exact nondashperturbative methods in d ≠ 1, various progresses have been made. In particular the singular forward scattering has been approached with some success by both bosonization and renormalization group methods." @default.
- W2086738863 created "2016-06-24" @default.
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- W2086738863 date "1999-02-01" @default.
- W2086738863 modified "2023-09-30" @default.
- W2086738863 title "Breakdown of Fermi liquid in correlated electron systems" @default.
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- W2086738863 doi "https://doi.org/10.1016/s0378-4371(98)00490-7" @default.
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