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Ph.D. thesis on the experimental study of field evaporation mechanisms of wide bandgap semiconductors (Male/Female)

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Français - Anglais

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General information

Reference : UMR6634-CHRVUR-018
Date of publication : Monday, May 18, 2020
Scientific Responsible name : Lorenzo Rigutti
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2020
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly

Description of the thesis topic

In the framework of the BreakingAP project (LABEX EMC3) and RIN DOC LABEX, The aim of this thesis is to systematically study semiconductor materials for light emitters in order to (i) arrive at a coherent description of composition measurement biases (ii) identify the physical mechanisms responsible for these biases (iii) identify the conditions for obtaining a reliable composition analysis and (iv) a reliable reconstruction of the quantum light emitters. In particular, the project will focus on the following questions:
- Is there an emission of neutral species which cannot be detected?
- What is the impact of in-flight dissociation of evaporated molecular species?
- Is the surface of an APT sample reconstructed because of the surface electric field and the stress it exerts?
- Is it possible to correlate the optical signature (transition energy) of a quantum emitter with the 3D reconstruction obtained by SAT?
This work should not only lead to a better understanding of the fundamental mechanisms of ion emission by field effect, but also yield significant feedback on the community working in APT on materials for lighting and micro-nano-electronics.

Work Context

The GPM (Group of Physics of Materials, UMR CNRS 6634) is structured in 5 departments: Materials-Aging-Mechanics, Scientific Instrumentation, Nanosciences, Disordered-Polymer Systems and Nano-Health-Physics. It brings together 160 staff including 60 Teachers-Researchers, 30 ITAs and 70 PhD students / PostDoct / Trainees. The laboratory is located on the Campus of Sciences and Engineering Rouen Normandy (in Rouen), in the University of Rouen Normandy and INSA Rouen Normandy (7000m2).
The recruited researcher will be attached to the Instrumentation Department, Research Team in Scientific Instrumentation (5 teacher-researchers, 3 IR, 2 IE, 4 PhD students), and will be required to collaborate with the research teams. Department Nanosciences.

Constraints and risks

Risks related to Lasers, Cryogenics, Chemical Treatments (use of acids and bases possible)

Additional Information

Expected skills:
- Master Degree in Physics, Materials Science or Engineering
- In-depth knowledge of solid state physics, physical chemistry, light-matter interaction

GPM offers annual APT and TEM training.

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