The characteristic features observed in photoelectron and bremsstrahlung isochromat spectra of - and -type Ce metals are interpreted by calculating the 4f-related density of states deduced from the 4f Greens function. Our model Hamiltonian includes Anderson-type mixing, which is assumed to be spherically symmetric around the Ce ion, and the f-level degeneracy and spin-orbit splitting are explicitly considered. The resolvent operator is expanded in a power series of the mixing potential, and the power series is summed by taking only noncrossing diagrams. The photoelectron spectrum of -Ce is well reproduced using a set of parameters which also fit the 4f electron number and the magnetic susceptibility. Another set of parameters appropriate for the spectrum of -Ce gives less satisfactory results for the static properties.
ASJC Scopus subject areas
- Condensed Matter Physics