Gap-anisotropic model for the narrow-gap Kondo insulators

Abstract

A theory is presented which accounts for the dynamical generation of a hybridization gap with nodes in the Kondo insulating materials $CeNiSn$ and $CeRhSb$. We show that Hunds interactions acting on virtual $4f^2$ configurations of the cerium ion can act to dynamically select the shape of the cerium ion by generating a Weiss field which couples to the shape of the ion. In low symmetry crystals where the external crystal fields are negligible, this process selects a nodal Kondo semimetal state as the lowest energy configuration.

Substantially Revised Version

References in corpus (3)

• A Theory of Anisotropic Semiconductor of Heavy Fermions
• Interplay between Heavy Fermions and Crystal Field Excitation in Kondo Lattices. Low-Temperature Thermodynamics and Inelastic Neutron Scattering Spectra of CeNiSn
• Hunds Rule Theory for Heavy Fermion Superconductors

Cited by in corpus (25)

• Topological Kondo Insulators
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• A theory of Topological Kondo Insulators
• Crystal-field and Kondo scale investigation of CeMIn5 (M=Co, Ir and Rh): a combined x-ray absorption and inelastic neutron study
• Crystal-field ground state of the orthorhombic Kondo insulator CeRu2Al10
• Formation Mechanism of Hybridization Gap in Kondo Insulators based on a Realistic Band Model and Application to YbB${}_{12}$
• Anisotropic optical conductivity of the putative Kondo insulator CeRu${}_4$Sn${}_6$
• muSR and inelastic neutron scattering investigations of the caged type Kondo semimetals: CeT2Al10 (T=Fe, Ru and Os)
• CeRu${}_4$Sn${}_6$: heavy fermions emerging from a Kondo-insulating state
• Another dimension: investigations of molecular magnetism using muon-spin relaxation
• Suppression of antiferromagnetic order and hybridization gap by electron- and hole-doping in the Kondo semiconductor CeOs${}_2$Al${}_{10}$
• Higher angular momentum Kondo liquids
• Finite-temperature spectra and quasiparticle interference in Kondo lattices: From light electrons to coherent heavy quasiparticles
• Heavy-fermion metals with hybridization nodes: Unconventional Fermi liquids and competing phases
• Angle dependent quasiparticle weights in correlated metals
• Resistivity, Hall effect and Shubnikov-de Haas oscillations in CeNiSn
• Electronic structure of CeRu4Sn6: a density functional plus dynamical mean field theory study
• Two-channel Kondo Lattice Model on a ladder studied by the Density Matrix Renormalization Group Method
• Giant isotropic Nernst effect in an anisotropic Kondo semimetal
• Dynamical mean-field theory for the anisotropic Kondo semiconductor: Temperature and magnetic field dependence
• Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6
• Peltier effect in normal metal-insulator-heavy fermion metal junctions
• Inelastic neutron scattering and muon spin relaxation investigations of the deuterated Kondo lattices CeNiSnD${}_x$
• A crossover from Kondo semiconductor to metallic antiferromagnet with $5d$-electron doping in CeFe${}_2$Al${}_{10}$
• The role of the short range magnetic correlations on the gap opening of the topological Kondo insulators