Lifshitz Transitions in Magnetic Phases of the Periodic Anderson Model

Abstract

We investigate the reconstruction of a Fermi surface, which is called a Lifshitz transition, in magnetically ordered phases of the periodic Anderson model on a square lattice with a finite Coulomb interaction between f electrons. We apply the variational Monte Carlo method to the model by using the Gutzwiller wavefunctions for the paramagnetic, antiferromagnetic, ferromagnetic, and charge-density-wave states. We find that an antiferromagnetic phase is realized around half-filling and a ferromagnetic phase is realized when the system is far away from half-filling. In both magnetic phases, Lifshitz transitions take place. By analyzing the electronic states, we conclude that the Lifshitz transitions to large ordered-moment states can be regarded as itinerant-localized transitions of the f electrons.

9 pages, 13 figures, to be published in J. Phys. Soc. Jpn

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• Electronic correlations, spectral and magnetic properties of ZrZn${}_2$
• Antiferromagnetic phase of the Kondo-insulator
• Antiferromagnetic Phases of the Kondo Lattice
• Enhanced Spin-Orbit Coupling in a Correlated Metal
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Variational Wavefunction for the Periodic Anderson Model with Onsite Correlation Factors
• Degenerate orbital effect in a three orbital periodic Anderson model
• Magnetic phases of the periodic Anderson model in two dimensions