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Etude par photoémission et microscopie à effet tunnel
des relations entre propriétés structurales et
électroniques des interfaces Ce/Sc(0001) et Ag/Au(111)

Abstract : In this thesis we have studied the structural and electronic properties of intermetallic interfaces by STM and angle-resolved photoemission (ARPES). In the first part we have studied the spin-orbit splitting (SOS) of the Shockley state in the Ag/Au(111) interface. Ag growth at 300 K follows a layer-by-layer mode, whereas annealing at higher temperatures leads to interdiffusion. ARPES measurements, supported by a modelisation of the interface, show that the SOS is proportional to the relative amounts of Au and Ag probed by the surface state wave function. This behaviour confirms the mainly atomic nature of the spin-orbit coupling in Shockley states. In the second part we have tried unsuccessfully to elaborate a strongly hybridized monocristalline a-Ce phase. RHEED measurements lead to the conclusion that the epitaxial film is in the weakly hybridized g phase, but ARPES measurements show a strong dispersive band near the Fermi level, arising from a surface state of d-symmetry.
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https://tel.archives-ouvertes.fr/tel-01748113
Contributor : Hervé Cercellier <>
Submitted on : Tuesday, March 13, 2007 - 10:20:05 PM
Last modification on : Thursday, November 12, 2020 - 3:42:03 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 1:34:00 AM

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  • HAL Id : tel-01748113, version 2

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Hervé Cercellier. Etude par photoémission et microscopie à effet tunnel
des relations entre propriétés structurales et
électroniques des interfaces Ce/Sc(0001) et Ag/Au(111). Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Henri Poincaré - Nancy 1, 2004. Français. ⟨NNT : 2004NAN10157⟩. ⟨tel-01748113v2⟩

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