Structure chimique et électronique des interfaces métal/ferroélectrique en fonction de la polarisation ferroélectrique

Julien Rault 1
1 LENSIS - Laboratoire d'Etude des NanoStructures et Imagerie de Surface
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : Screening phenomena at the interface between a ferroelectric (FE) and an electrode are of great interest both from a fundamental point of view and for potential applications using a FE layer (FeRAM, FE tunnel junctions). In this thesis, we used photoemission-based techniques to study several screening phenomena on FE perovskites. Firstly, PhotoElectron Emission Microscopy (PEEM) experiment revealed a FE monodomain to stripe-domains transition in ultrathin film of BiFeO3 when reducing film thickness. Still by using PEEM, we carried out a quantitative investigation of oxygen vacancies as internal screening in BaTiO3 single crystals. Secondly, we used x-ray photoemission spectroscopy (XPS) with in-situ applied bias to investigate the electronic properties electrode/BaTiO3 interfaces and measure the polarization-induced band shifts.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00840865
Contributor : Julien Rault <>
Submitted on : Wednesday, July 3, 2013 - 2:02:26 PM
Last modification on : Thursday, February 7, 2019 - 1:33:41 AM
Long-term archiving on: Friday, October 4, 2013 - 4:10:21 AM

Identifiers

  • HAL Id : tel-00840865, version 1

Citation

Julien Rault. Structure chimique et électronique des interfaces métal/ferroélectrique en fonction de la polarisation ferroélectrique. Science des matériaux [cond-mat.mtrl-sci]. Université Pierre et Marie Curie - Paris VI, 2013. Français. ⟨tel-00840865⟩

Share

Metrics

Record views

580

Files downloads

1462