Influence of disorder on the transport properties of heavy-fermion systems

Abstract

The influence of substitutional disorder on the transport properties of heavy-fermion systems is investigated. We extend the dynamical mean-field theory treatment of the periodic Anderson model (PAM) to a coherent-potential approximation for disordered strongly correlated electron systems. Considering two distinct local environments of a binary alloy $A_c{B}_{1-c}$ with arbitrary concentration $c$, we explore two types of disorder: on the f site and on the ligand sites. We calculate the spectral functions and self-energies for the disordered PAM as well as the temperature dependence of the resistivity and the thermoelectric power. The characteristic concentration dependence as well as the order of magnitude of transport properties are reproduced for metallic heavy-fermion systems and Kondo insulators. In particular, sign changes of the Seebeck coefficient as function of temperature and concentration are observed.

arXiv comment17 pages, 22 figures, published version

References in corpus (27)

• Anomalous Normal-State Properties of High-T${}_c$ Superconductors -- Intrinsic Properties of Strongly Correlated Electron Systems?
• Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach
• Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
• Numerical Renormalization Group Calculations for the Self-energy of the impurity Anderson model
• Finite temperature numerical renormalization group study of the Mott-transition
• The Hubbard Model at Infinite Dimensions: Thermodynamic and Transport Properties
• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Spin Precession and Real Time Dynamics in the Kondo Model: A Time-Dependent Numerical Renormalization-Group Study
• Disorder-driven non-Fermi liquid behavior in Kondo alloys
• Anderson impurity in pseudo-gap Fermi systems
• Kondo disorder: a possible route towards non-Fermi liquid behavior
• The low-energy scale of the periodic Anderson model
• Protracted Screening in the Periodic Anderson Model
• Phase Diagram of the Two-Channel Kondo Lattice
• Transport Properties of the Infinite Dimensional Hubbard Model
• Mott-Hubbard metal-insulator transition at non-integer filling
• Dynamics and transport properties of Kondo insulators
• Dynamics and scaling in the periodic Anderson model
• Strongly Inhomogeneous Phases and Non-Fermi Liquid Behavior in Randomly Depleted Kondo Lattices
• Random Kondo Alloys
• Composite Spin-Triplet Superconductivity in an $SU(2)\otimes SU(2)$ Symmetric Lattice Model
• Dynamics of disordered heavy Fermion systems
• From ferromagnetism to spin-density wave: Magnetism in the two channel periodic Anderson model
• On X-ray-singularities in the f-electron spectral function of the Falicov-Kimball model
• Conductivity of disordered electrons: Mean-field approximation containing vertex corrections
• Ordered states in the disordered Hubbard model
• Self-consistent Treatment of Crystal-Electric-Field-Levels in the Anderson Lattice

Cited by in corpus (19)

• Finite-temperature spectra and quasiparticle interference in Kondo lattices: From light electrons to coherent heavy quasiparticles
• Emergent Coherent Lattice Behavior in Kondo Nanosystems
• Distributed Hybridization Model for Quantum Critical Behavior in Magnetic Quasicrystals
• Strong spin Seebeck effect in Kondo T-shaped double quantum dots
• Ferromagnetism and Kondo Insulator Behavior in the Disordered Periodic Anderson Model
• Lifshitz transition in Kondo alloys
• Crossover from dilute-Kondo system to heavy-fermion system
• Fragility of the Kondo insulating gap against disorder: relevance to recent puzzles in topological Kondo insulators
• Non-Fermi liquid behaviour from dynamical effects of impurity scattering in correlated Fermi liquids
• Spectral changes in layered $f$-electron systems induced by Kondo hole substitution in the boundary-layer
• Kondo-hole substitution in heavy fermions: dynamics and transport
• Effect of Disorder on Fermi surface in Heavy Electron Systems
• Kondo holes in strongly correlated impurity arrays: RKKY driven Kondo screening and hole-hole interactions
• Effects of Antisite Defects on Seebeck Coefficient in Fe_2VAl -- Analyses based on Bipolar Random Anderson Model
• Breakdown of coherence in Kondo alloys: crucial role of concentration vs band filling
• Restoring the continuum limit in the time-dependent numerical renormalization group approach
• Theory of angle-resolved photoemission experiments on a two-band model
• Griffiths phases in structurally disordered CeRhSn: Experimental evidence and theoretical modeling
• Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach