Description of the thesis topic

A simple relative shift between two two-dimensional (2D) crystals is enough to profoundly transform the electronic properties of the resulting heterostructure. Remarkably, a wide bandgap insulator can acquire ferroelectric properties solely as a result of this slip, without any chemical modification. This unprecedented phenomenon induces the appearance of out-of-plane ferroelectric domains, paving the way for a new class of functional materials with disruptive properties.
The main objective of this thesis is to detect, analyze, and ultimately control the ferroelectric state of these 2D materials optoelectrically. The project is structured around several areas of focus:
This thesis will be affiliated with the Physics and Physical Chemistry doctoral school (ED 182).

Work Context

The successful candidate will join the Magnetism of NanoStructured Objects Department at the Institute of Physics and Chemistry of Materials in Strasbourg (IPCMS), an innovative joint research unit of the CNRS and the University of Strasbourg with 230 employees, specifically a dynamic team of condensed matter experimenters with recognized expertise in 2D materials, ferroelectric materials, and nanoelectronic devices, currently composed of Dr. Bohdan Kundys, Prof. Bernard Doudin, and Prof. Jean-François Dayen.
The main responsibilities will be as follows
1. Advanced characterization of ferroelectric domains using appropriate piezoelectric spectroscopies (PFM, local polarization measurements).
2. Integration into nanofabricated devices in order to explore their electronic and functional properties.
3. Dynamic control of domain states through electrical and/or optical excitations.
The project has a strong international dimension: the doctoral student will interact with a multicultural team and benefit from active collaborations with leading laboratories in France, Europe, the United States, India, and Japan. The thesis will be carried out in close collaboration with several partners from the European consortium 2DFerroplex (Pathfinder project).

The position is located in a sector under the protection of scientific and technical potential (PPST), and therefore requires, in accordance with the regulations, that your arrival is authorized by the competent authority of the MESR.