Potentiels de muffin tin, déphasages et structure électronique pour l'interprétation de nos mesures de transport électronique dans les alliages métalliques liquides à base de germanium (Ge-Ag ; Ge-Zn ; Ge-Cd)

Abstract : This work was devoted to the experimental measurement of electron transport properties of binary liquid metals alloys with germanium (Ge-Ag ; Ge-Zn ; Ge-Cd). One of the originality of this study is the difficulty to control the measurements on these alloys because of their high vapor pressure. The experimental results are interpreted and discussed in term of Faber Ziman extended formula depending on the phase shifts due to diffusion by the muffin-tin potential for pure metals. We made a critical analysis for different construction methods of the muffin-tin potentials. In these methods we proceed by a construction of an atomic potential using Herman-Skilman-Slater approach or an ionic screened potential using Ratti approach. We introduced in both the exchange correction of Robinson, and we use an self consistent determination of the Fermi energy by adjusting the muffin-tin zero potential on the conduction band energy bottom. The differents improvements of the theory led us to a satisfactory interpretation of the alloys studied in this work
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Ahmed Makradi. Potentiels de muffin tin, déphasages et structure électronique pour l'interprétation de nos mesures de transport électronique dans les alliages métalliques liquides à base de germanium (Ge-Ag ; Ge-Zn ; Ge-Cd). Autre. Université Paul Verlaine - Metz, 1997. Français. ⟨NNT : 1997METZ014S⟩. ⟨tel-01777200⟩

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