Contribution à l'étude des propriétés de transport électronique des alliages liquides de gallium à diagramme de phase métastable et à lacune de miscibilité : AU-GA, GA-IN, GA-SN, CD-GA et GA-HG

Abstract : The aim of this thesis was to study the electronic transport properties of metallic alloys of gallium which exhibits a metastable phase (Ga-In and Ga-Sn) and a miscibility gap (Cd-Ga and Ga-Hg). We have measured the electrical resistivity of Ga-In and Ga-Sn liquid alloys. We have also display the anomaly of the temperature coefficient of resistivity of Ga50Hg50 critical alloy which can be attribuated at the manifestation of concentration fluctuations Scc(0). These measurements permit us to bring important original results. The experimental values have been interpreted and discussed in a t matrix formulation of Ziman's nearly-free-electron theory. The t-matrix is expressed in term of phase shifts computed by using a suitable muffin-tin potential calculated with Slater and Kohn-Sham appraoches in the determination of the exchange energy
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Abdelilah Yazi. Contribution à l'étude des propriétés de transport électronique des alliages liquides de gallium à diagramme de phase métastable et à lacune de miscibilité : AU-GA, GA-IN, GA-SN, CD-GA et GA-HG. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 1997. Français. ⟨NNT : 1997METZ029S⟩. ⟨tel-01777214⟩

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