Theoretical Study of Electron Phonon Interaction in Heavy Fermion Systems | Original Article

ABSTRACT:

A systematic theory of the electron-phonon interaction in heavy-fermion systems is created based on the mean-field approximation for the Kondo lattice. The electron-phonon interaction is brought into the Anderson Hamiltonian by expecting that the hybridization between f electrons and conduction electrons relies upon the local lattice strain. The interaction with conduction electrons is incorporated by utilizing a distortion potential-type coupling. By illuminating the mean-field conditions within the sight of lattice displacements, interactions depicted by Kondo bosons are remembered for the current theory. Utilizing an irregular phase-type approximation for the Kondo-boson propagators, the phonon self-energy and the flexible constants are determined. The interaction mediated by phonons is inferred, and its opposition with the interaction by Kondo bosons is considered. The aftereffects of the current theory are contrasted and a powerful static electron-phonon interaction. It is discovered that this is a reasonable approximation for interaction measures with enormous momentum move and little frequencies The expanding of this difference by temperature makes the movement of the f electrons hybrid from wave proliferation to dissemination. This mechanism clarifies the noticed double nature of the f electrons, to be specific that at low temperatures they carry on like a Fermi fluid, while at high temperatures they develop into a grid of limited magnetic minutes.