Interplay between Heavy Fermions and Crystal Field Excitation in Kondo Lattices. Low-Temperature Thermodynamics and Inelastic Neutron Scattering Spectra of CeNiSn

Abstract

The microscopic theory of interaction between the heavy fermions and the crystal field excitations in Kondo lattices is presented. It is shown that the heavy-fermion spectrum scaled by the Kondo temperature $T_K$ can be modified by the crystal field excitations with the energy ${\Delta }_{CF}$ provided the inequality ${\Delta }_{CF}<T_K$ is realized. On the base of general description of excitation spectrum the detailed qualitative and quantitative explanation of anisotropic inelastic neutron scattering spectra and low-temperature specific heat of orthorhombic CeNiSn is given. The theory resolves the apparent contradiction between the metallic conductivity and the gap-wise behavior of thermodynamic properties and spin response of CeNiSn at low temperatures.

arXiv comment24 pages (LaTeX), 12 Postscript figures, submitted to Phys.Rev. B

References in corpus (1)

• A Theory of Anisotropic Semiconductor of Heavy Fermions

Cited by in corpus (8)

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• Crystal-field ground state of the non-centrosymmetric superconductor CePt3Si: a combined polarized soft X-ray absorption and polarized neutron study
• Resistivity, Hall effect and Shubnikov-de Haas oscillations in CeNiSn
• Thermodynamics of CeNiSn at low temperatures and in weak magnetic fields
• Quasielastic magnetic scattering of neutrons at the systems with heavy fermions
• Inelastic neutron scattering and muon spin relaxation investigations of the deuterated Kondo lattices CeNiSnD${}_x$