Temperature-dependent quasiparticle band structure of the ferromagnetic semiconductor EuS

摘要: We present calculations for the temperature-dependent electronic structure of ferromagnetic semiconductor EuS. A combination a many-body evaluation multiband Kondo-lattice model and first-principles $T=0$\char21{}band-structure calculation [tight-binding linear muffin-tin orbital (TB-LMTO)] is used to get realistic information about temperature- correlation effects in EuS energy spectrum. The combined method strictly avoids double-counting any relevant interaction. Results are presented terms spectral densities, quasiparticle band structures, densities states, that over entire temperature range.