Effect of Disorder on Fermi surface in Heavy Electron Systems

Abstract

The Kondo lattice model with substitutional disorder is studied with attention to the size of the Fermi surface and the associated Dingle temperature. The model serves for understanding heavy-fermion Ce compounds alloyed with La according to substitution Ce{x}La{1-x}. The Fermi surface is identified from the steepest change of the momentum distribution of conduction electrons, and is derived at low enough temperature by the dynamical mean-field theory (DMFT) combined with the coherent potential approximation (CPA). The Fermi surface without magnetic field increases in size with decreasing x from x=1 (Ce end), and disappears at such x that gives the same number of localized spins as that of conduction electrons. From the opposite limit of x=0 (La end), the Fermi surface broadens quickly as x increases, but stays at the same position as that of the La end. With increasing magnetic field, a metamagnetic transition occurs, and the Fermi surface above the critical field changes continuously across the whole range of x. The Dingle temperature takes a maximum around x=0.5. Implication of the results to experimental observation is discussed.

5 pages, 5 figures

References in corpus (13)

• Disorder-driven non-Fermi liquid behavior in Kondo alloys
• Coherence scale of the Kondo lattice
• Continuous Evolution of the Fermi Surface of CeRu2Si2 across the Metamagnetic Transition
• Continuous-Time Quantum Monte Carlo Method for the Coqblin-Schrieffer Model
• Evolution of a Large Fermi Surface in the Kondo Lattice
• Magnetic phases in the correlated Kondo-lattice model
• Random Kondo Alloys
• The Kondo Lattice Model in Infinite Dimensions I. Formalism
• Influence of disorder on the transport properties of heavy-fermion systems
• Magnetization Process in the One-Dimensional Doped Kondo Lattice Model
• Ferromagnetism and Kondo Insulator Behavior in the Disordered Periodic Anderson Model
• Crossover from dilute-Kondo system to heavy-fermion system
• The de Haas-van Alphen effect in Kondo systems with crystalline electric field

Cited by in corpus (6)

• Fermi Surface Properties, Metamgnetic Transition and Quantum Phase Transition of CeRu${}_2$Si${}_2$ and Its Alloys Probed by the dHvA Effect--Fermi Surface Studies on the Itinerant and Localized Dichotomy of $f$ Electron Nature
• Distributed Hybridization Model for Quantum Critical Behavior in Magnetic Quasicrystals
• A Strongly-Interacting Dirac Liquid on the Surface of a Topological Kondo Insulator
• Lifshitz transition in Kondo alloys
• 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