Momentum distribution functions in a one-dimensional extended periodic anderson model

Hagymási, Imre and Sólyom, Jenő and Legeza, Örs (2015) Momentum distribution functions in a one-dimensional extended periodic anderson model. ADVANCES IN CONDENSED MATTER PHYSICS, 2015. ISSN 1687-8108

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Abstract

We study the momentum distribution of the electrons in an extended periodic Anderson model, where the interaction, Ucf , between itinerant and localized electrons is taken into account. In the symmetric half-filled model, due to the increase of the interorbital interaction, the f electrons become more and more delocalized, while the itinerancy of conduction electrons decreases. Above a certain value of Ucf the f electrons become again localized together with the conduction electrons. In the less than half-filled case, we observe that Ucf causes strong correlations between the f electrons in the mixed valence regime.

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