Prof. Adina Luican-Mayer
University of Ottawa, Canada

Material systems, devices, and circuits, based on the manipulation of individual charges, spins, and photons in solid-state platforms are key for quantum technologies. The field of two-dimensional (2D) materials presents an emerging opportunity for the development of next-generation quan-tum technologies, while also pushing the boundaries of fundamental under-standing of condensed matter systems.
Through a combination of nano-fabrication methods, scanning probe microscopy, and other supporting tech-niques, our laboratory explores quantum functionality in 2D materials and their heterostructures.

In the first part of the talk, I will focus on novel phenomena in moiré structures created by twisting 2D layers. I will discuss the demonstration of reversible local response of domain wall networks using scanning tunneling microscopy in ferroelectric interfaces of marginally twisted WS₂ bilayers. Moreover, in the case of twisted WS₂ bilayers close to 60°, we observe signatures of flat bands and study the influence of atomic relaxation on their band structure. In the second part of the talk, I will discuss our progress in realizing quantum-confined devices in 2D semiconductors, including quantum dots and quantum point contacts.