Lifshitz transition in Kondo alloys

Abstract

We study the low energy states of Kondo alloys as function of the magnetic impurity concentration per site, x, and the conduction electron average site occupation, nc. Using two complementary approaches, the mean-field coherent potential approximation and the strong coupling limit, we identify and characterize two different Fermi liquid regimes. We propose that both regimes are separated by a Lifshitz transition at x = nc. Indeed, we predict a discontinuity of the number of quasiparticles which are enclosed in the Fermi surface. This feature could provide a scenario for the non-Fermi liquid properties that were recently observed in Kondo alloy systems around x = nc.

5 pages, 2 figures

References in corpus (7)

• The numerical renormalization group method for quantum impurity systems
• Single-ion Kondo Scaling of the Coherent Fermi Liquid Regime in Ce1-xLaxNi2Ge2
• Strongly Inhomogeneous Phases and Non-Fermi Liquid Behavior in Randomly Depleted Kondo Lattices
• Multiple temperature scales of the periodic Anderson model: the slave bosons approach
• Influence of disorder on the transport properties of heavy-fermion systems
• Antiferromagnetic metal to heavy-fermion metal quantum phase transition in the Kondo lattice model: A strong coupling approach
• Effect of Disorder on Fermi surface in Heavy Electron Systems

Cited by in corpus (7)

• Field-Induced Lifshitz Transition without Metamagnetism in CeIrIn${}_5$
• Strong-coupling limit of depleted Kondo- and Anderson-lattice models
• Remarkably robust and correlated coherence and antiferromagnetism in (Ce${}_{1-x}$La${}_x$)Cu${}_2$Ge${}_2$
• Non-Fermi liquid behaviour from dynamical effects of impurity scattering in correlated Fermi liquids
• Breakdown of coherence in Kondo alloys: crucial role of concentration vs band filling
• Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach
• Lifshitz Transition in Triangular Lattice Kondo-Heisenberg Model