Temperature dependent properties of metallic clusters containing magnetic impurities |
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| Authors: | J.L. Ricardo-Chávez G.M. Pastor |
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| Affiliation: | (1) Laboratoire de Physique Quantique, Université Paul Sabatier, 31062 Toulouse, France, FR |
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| Abstract: | The properties of magnetic impurities in small metallic clusters are investigated in the framework of the Anderson model by using exact diagonalization methods. Parameters representative of the Kondo limit are considered. The spin gap ΔE = E(S=1, 3/2) - E(S=0, 1/2) shows a remarkable band-filling dependence that can be interpreted in terms of the cluster-specific conduction-electron spectrum. Finite-temperature properties such as the magnetic susceptibility and specific heat are calculated exactly in the canonical and grand canonical ensembles. The structural dependence is illustrated. Received 30 November 2000 |
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| Keywords: | PACS. 73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals – 75.20.Hr Local moment in compounds and alloys Kondo effect, valence fluctuations, heavy fermions – 71.27.+a Strongly correlated electron systems heavy fermions |
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