Abstract
We present calculations for the temperature-dependent electronic structure and magnetic properties of thin ferromagnetic EuO films. The treatment is based on a combination of a multiband Kondo lattice model with first-principles tight-binding linear muffin-tin orbital band-structure calculations. The method avoids the problem of double counting relevant interactions and takes into account the correct symmetry of the atomic orbitals. We discuss the temperature-dependent electronic structures of EuO(100) films in terms of quasiparticle densities of states and quasiparticle band structures. The Curie temperature ${T}_{\mathrm{C}}$ of the EuO films turns out to be strongly thickness dependent, starting from a very low value $(\ensuremath{\simeq}15$ K) for the monolayer and reaching the bulk value at about 25 layers.
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