Crossover from conventional to inverse indirect magnetic exchange in the depleted Anderson lattice

Abstract

We investigate the finite-temperature properties of an Anderson lattice with regularly depleted impurities. The physics of this model is ruled by two different magnetic exchange mechanisms: conventional Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction at weak hybridization strength V and a novel inverse indirect magnetic exchange (IIME) at strong V, both favoring a ferromagnetic ground state. The stability of ferromagnetic order against thermal fluctuations is systematically studied by static mean-field theory for an effective low-energy spin-only model emerging perturbatively in the strong-coupling limit as well as by dynamical mean-field theory for the full model. The Curie temperature is found at a maximum for a half-filled conduction band and at intermediate hybridization strengths in the crossover regime between RKKY and IIME.

12 pages, 11 figures, v2 with minor corrections

References in corpus (8)

• Continuous-time Monte Carlo methods for quantum impurity models
• Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
• Observation of two-orbital spin-exchange interactions with ultracold SU(N)-symmetric fermions
• Far-from-equilibrium spin transport in Heisenberg quantum magnets
• Direct observation of coherent inter-orbital spin-exchange dynamics
• Strong-coupling limit of depleted Kondo- and Anderson-lattice models
• Spin-spin correlations in ferromagnetic nanosystems
• Cooperation of different exchange mechanisms in confined magnetic systems

Cited by in corpus (5)

• Determinant Quantum Monte Carlo Study of Exhaustion in the Periodic Anderson Model
• Resonance Effects in Correlated Multilayer Heterostructures
• Kondo holes in strongly correlated impurity arrays: RKKY driven Kondo screening and hole-hole interactions
• Kondo breakdown in multi-orbital Anderson lattices induced by destructive hybridization interference
• Power-Law Spectra and Asymptotic $\omega /T$ Scaling in the Orbital-Selective Mott Phase of a Three-Orbital Hubbard Model