Description
We have shown the ability to create nanometer and sub-nm scale defects in 2D and layered 2D materials using electron and ion irradiation, as well as chemical etching, and characterize them under various treatment conditions (temperature, gases, etc.) using microscopy and optical methods and evaluate their fundamental properties and benefits for quantum and other applications. I will discuss the creation and characterization (in-situ and operando) of defects in 2D materials such as hBN and other 2D materials (including 2D ferromagnets) using AC-STEM electron-beam drilling, and measurements of resulting photoluminescence and other physical properties which are relevant for quantum device applications such as in quantum computing and quantum sensing. We also probe the effects of geometric confinement on magnetic properties in 2D ferromagnetic materials using low-temperature Lorentz transmission electron microscopy, a powerful technique which enables direct observation of magnetic domains down to the nanometer scale.
