Non-fermi-liquid behavior in the periodic Anderson model

We study the Mott metal-insulator transition in the periodic Anderson model with dynamical mean field theory (DMFT). Near the quantum transition, we find a non-Fermi-liquid metallic state down to a vanishing temperature scale. We identify the origin of the non-Fermi-liquid behavior as being due to m...

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Detalles Bibliográficos
Autores principales: Amaricci, A., Sordi, G., Rozenberg, M.J.
Formato: JOUR
Materias:
Fermi surface
Fermions
Magnetic anisotropy
Magnetic fields
Magnetic materials
Magnetic properties
Mean field theory
Metal insulator boundaries
Semiconductor insulator boundaries
Semiconductor quantum dots
Statistical mechanics
Doped carriers
Dynamical mean-field theory
External magnetic fields
Heavy fermion systems
Localized moments
Magnetic fluctuations
Magnetic scattering
Metal insulators
Metallic states
Non-Fermi-liquid
Non-fermi-liquid behavior
Periodic Anderson model
Quantum transitions
Metal insulator transition
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319007_v101_n14_p_Amaricci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We study the Mott metal-insulator transition in the periodic Anderson model with dynamical mean field theory (DMFT). Near the quantum transition, we find a non-Fermi-liquid metallic state down to a vanishing temperature scale. We identify the origin of the non-Fermi-liquid behavior as being due to magnetic scattering of the doped carriers by the localized moments. The non-Fermi-liquid state can be tuned by either doping or external magnetic field. Our results show that the coupling to spatial magnetic fluctuations (absent in DMFT) is not a prerequisite to realizing a non-Fermi-liquid scenario for heavy fermion systems. © 2008 The American Physical Society.

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