The Waterloo Institute for Nanotechnology (WIN) and the Center for Nanointegration Duisberg-Essen (CENIDE) are pleased to present Adina Luican-Mayer, Associate Professor in the Department of Physics at the University of Ottawa, for a joint 2D-MATURE seminar titled "Quantum Functionality in 2D Materials."
Join us in QNC 1501. Refreshments will be provided! Registration required.
Quantum Functionality in 2D Materials
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 quantum technologies, while also pushing the boundaries of fundamental understanding of condensed matter systems. Through a combination of nanofabrication methods, scanning probe microscopy and other supporting techniques, our laboratory explores quantum functionality in 2D materials and their heterostructures. In this talk, I will focus on three topics: 1. Progress in realizing a quantum simulation platform using scanning tunnelling microscopy and spectroscopy of novel moiré structures created by twisting 2D layers. 2. 2D semiconducting devices for quantum information science. 3. Environmental sensing using 2D field effect transistors. 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. Lastly, I will describe our progress in realizing selective gas sensors using graphene field effect transistors.