The Kondo lattice state in the presence of Van Hove singularities: Next-to-leading order scaling

Renormalization group analysis of the Kondo model with a logarithmic Van Hove singularity in the electron density of states has been carried out in the next-to-leading scaling approximation in different magnetic phases. The effective coupling constant remains small, while the renormalized magnetic m...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2017-07, Vol.125 (1), p.159-166
Main Author: Irkhin, V. Yu
Format: Article
Language:English
Subjects:
ABLATION
Analysis
Classical and Quantum Gravitation
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Coupling
COUPLING CONSTANTS
DENSITY OF STATES
ELECTRON DENSITY
Electron spin
Electronic Properties of Solid
Elementary Particles
Laws, regulations and rules
MAGNETIC MOMENTS
MAGNETISM
Particle and Nuclear Physics
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theory
Quantum theory
Relativity Theory
RENORMALIZATION
Scaling
Singularities
SINGULARITY
Solid State Physics
VANS
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Summary:Renormalization group analysis of the Kondo model with a logarithmic Van Hove singularity in the electron density of states has been carried out in the next-to-leading scaling approximation in different magnetic phases. The effective coupling constant remains small, while the renormalized magnetic moment and the frequency of spin fluctuations decrease by several orders of magnitude. In this way, broad regions of non-Fermi-liquid behavior are found from scaling trajectories in a large interval of the bare coupling constant. Applications to the physics of itinerant magnetism are considered.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776117070044