Magnetic ordering and non-Fermi-liquid behavior in the multichannel Kondo-lattice model

Abstract

Scaling equations for the Kondo lattice in the paramagnetic and magnetically ordered phases are derived to two-loop order with account of spin dynamics. The results are applied to describe various mechanisms of the non-Fermi-liquid (NFL) behavior in the multichannel Kondo-lattice model where a fixed point occurs in the weak-coupling region. The corresponding temperature dependences of electronic and magnetic properties are discussed. The model describes naturally formation of a magnetic state with soft boson mode and small moment value. An important role of Van Hove singularities in the magnon spectral function is demonstrated. The results are rather sensitive to the type of magnetic ordering and space dimensionality, the conditions for NFL behavior being more favorable in the antiferromagnetic and 2D cases.

9 pages, final version, European Physical Journal B

References in corpus (2)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Anomalous ferromagnetism and non-Fermi-liquid behavior in the Kondo lattice CeRuSi2

Cited by in corpus (6)

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• Non-Fermi liquid behavior and quantum criticality in cubic heavy fermion systems with non-Kramers multipolar local moments
• One- and two-channel Kondo model with logarithmic Van Hove singularity: a numerical renormalization group solution
• The Kondo-lattice state in the presence of Van Hove singularities: a next-leading order scaling description
• Scaling theory of magnetism in frustrated Kondo lattices
• Degenerate orbital effect in a three orbital periodic Anderson model