Landau-Fermi liquid theory is conventionally believed to hold whenever the interacting single-particle density of states develops a δ-like component at the Fermi surface, which is associated with quasiparticles. Here we show that a microscopic justification can be actually achieved under more general circumstances, even in the case where coherent quasiparticles are totally missing and the interacting single-particle density of states vanishes at the chemical potential as a consequence of a pole singularity in the self-energy.

Landau-Fermi liquids without quasiparticles / Fabrizio, M.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 102:15(2020), pp. 155122-1-155122-10. [10.1103/PhysRevB.102.155122]

Landau-Fermi liquids without quasiparticles

Fabrizio M.
2020-01-01

Abstract

Landau-Fermi liquid theory is conventionally believed to hold whenever the interacting single-particle density of states develops a δ-like component at the Fermi surface, which is associated with quasiparticles. Here we show that a microscopic justification can be actually achieved under more general circumstances, even in the case where coherent quasiparticles are totally missing and the interacting single-particle density of states vanishes at the chemical potential as a consequence of a pole singularity in the self-energy.
2020
102
15
155122-1
155122-10
Fabrizio, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/116329
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