Study on the growth and physical properties of MX2 heterostructures (Master)

Novel two-dimensional materials, and especially semi-conducting transition metal dichalcogenides (MX2, with M a transition metal and X a chalcogen) offer advanced functionality in complex and ultra-scaled integrated systems. In view of their compelling electronic, magnetic and optical properties for a monolayer form, imec explores their integration for various applications and systems, in particular for advanced CMOS technologies in a beyond silicon roadmap. 

Improving channel transport properties, scaling the equivalent gate oxide thickness, and reducing the contact resistance are the main challenges for demonstrating performant 2D scaled devices. As some progresses have been made materials development, several challenges remain in order to improve the electrical properties of MX2 materials.  Heterostructures, consisting of two or more 2D materials in vertical stack, can preserve the unique properties of the monolayers and offer a mechanism to tune electrical properties.

In this project, the candidate will be part of the MX2 growth team imec on the synthesis of layer-by-layer growth of 2D materials. We want to understand the nucleation of MX2 on other 2D materials; more important understand how the physical and electrical properties can be tuned from the formation of these heterolayers. This is an experimental topic and requires working most of the time in the clean room. Activities include manipulation and preparation of samples for growth. The preparation of samples for different physical characterisations together with the analysis of the data. All the necessary training will be provided, and we will support you in the writing of your Master thesis.