Abstract
In Rare-Earth (RE) systems, direct overlapping of 4f orbitals plays a role if the distance between RE ions is sufficiently small. Especially, such a situation happens under pressure for RE metals and RE compounds. Furthermore, in Actinide systems, 5f orbitals are more extended than the previously considered 4f orbitals. Therefore, in this case, direct overlapping of 5f orbitals should be taken into account even without applying pressure. In the present work, using Standard Basis Operators, we study direct overlapping effect of f orbitals for valence fluctuating materials in Kondo regime. An important result within our present model is that direct f orbital overlapping reduces f electron effective mass.
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Razafimandimby, H., Randrianasoloharisoa, D., Rakotomahevitra, A. et al. Direct overlapping effect of f orbitals for valence fluctuating materials in Kondo regime. Eur. Phys. J. B 68, 495–500 (2009). https://doi.org/10.1140/epjb/e2009-00118-3
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DOI: https://doi.org/10.1140/epjb/e2009-00118-3