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.

References in corpus (4)

• Strongly correlated regimes in a double quantum-dot device
• Orbital ordering phenomena in $d$- and $f$-electron systems
• Competing Orders and Disorder-induced Insulator to Metal Transition in Manganites
• Monte Carlo Study of Doping Change and Disorder Effect on Double Exchange Ferromagnetism

Cited by in corpus (6)

• The numerical renormalization group method for quantum impurity systems
• Properties of anisotropic magnetic impurities on surfaces
• Magnetic phases in the correlated Kondo-lattice model
• Double-Exchange Enhanced Magnetic Blue-Shift of Mott Gaps
• Antiferromagnetic Chern insulator with large charge gap in heavy transition-metal compounds
• Antiferromagnetic topological insulators in heavy-fermion systems