Relevance of quantum fluctuations in the Anderson-Kondo model

Abstract

We study a localized spin coupled to an Anderson impurity to model the situation found in higher transition metal or rare earth compounds like e.g.\ LaMnO${}_3$ or Gd monopnictides. We find that, even for large quantum numbers of the localized spin, quantum fluctuations play an essential role for the case of ferromagnetic coupling between the spin and the impurity levels. For antiferromagnetic coupling, a description in terms of a classical spin is appropriate.

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Cited by in corpus (8)

• The numerical renormalization group method for quantum impurity systems
• Properties of anisotropic magnetic impurities on surfaces
• Universal transport signatures in two-electron molecular quantum dots: gate-tunable Hund's rule, underscreened Kondo effect and quantum phase transitions
• Magnetic phases in the correlated Kondo-lattice model
• Double-Exchange Enhanced Magnetic Blue-Shift of Mott Gaps
• Kondo screening in high-spin side-coupled two-impurity clusters
• Antiferromagnetic Chern insulator with large charge gap in heavy transition-metal compounds
• Antiferromagnetic topological insulators in heavy-fermion systems