Skip to Main content Skip to Navigation
Habilitation à diriger des recherches

Croissance des films minces et interfaces : exemples dans deux familles de matériaux pour la microélectronique

Abstract : This dissertation for the « Habilitation à Diriger des Recherches (HDR) » presents some of my research activities since 2006. It is based on the surfaces and interfaces in the materials for microelectronics. This common theme gathers studies on organic type n semiconductors for organic thin film field effect transistors and on a manganese/germanium alloy for spintronics : Mn5Ge3. The first part of this manuscript deals with the organic semiconductors. The growth of thin films of PTCDI-8C and quaterrylene on SiO2 substrates is studied as a function of the functionalization of the SiO2 surface with OTS molecules. Regarding the metal/semiconductor interfaces, the influence of the metal for the drain and source contacts is discussed in the case of FET made of TTCDI-5C molecules. Then the interface engineering for improving optical switching in a diarylethene-channel transistor is analysed. The second part of the manuscript is focused on the Mn5Ge3 thin films on Ge(111) substrates for spintronic applications. Mn5Ge3 is a ferromagnetic compound with a close to room temperature transition. This Curie Temperature can be increased by incorparation of carbon atoms in the interstitial sites of the Mn5Ge3 lattice. We described a new growth process called low-temperature reactive deposition epitaxy. The structural and magnetic properties of the thin films grown with this method exhibit a better quality than the films grown by the commonly used solid phase epitaxy. The interdiffusion phenomenon is reduced at the Mn5Ge3/Ge(111) interface and the magnetic properties are enhanced thanks to a better carbon homogeneity. Eventually the Mn5Ge3Cx/Ge(111) Schottky contact is caracterised with the view to the electrical spin injection from Mn5Ge3 to Ge.
Document type :
Habilitation à diriger des recherches
Complete list of metadatas

https://hal-amu.archives-ouvertes.fr/tel-01592798
Contributor : Matthieu Petit <>
Submitted on : Tuesday, September 26, 2017 - 8:52:51 AM
Last modification on : Tuesday, October 20, 2020 - 3:10:45 AM

Licence


Public Domain

Identifiers

  • HAL Id : tel-01592798, version 2

Collections

Citation

Matthieu Petit. Croissance des films minces et interfaces : exemples dans deux familles de matériaux pour la microélectronique. Science des matériaux [cond-mat.mtrl-sci]. Aix-Marseille Université (AMU), 2017. ⟨tel-01592798v2⟩

Share

Metrics

Record views

294

Files downloads

474