Unlocking the potential of perovskite ferroelectrics in electronics relies on a comprehensive understanding of their structure down to the atomic level. The critical components in this pursuit are structural imperfections that span multiple dimensions, including point defects, dislocations, domain walls, grain boundaries and nanodomains that interact with each other. Utilizing advanced atomic-scale scanning transmission electron microscopy with a 4D STEM pixelated detector allows us to analyze defect types, detect strain fields, observe charge density distribution, and study dynamic responses under external stimuli. In my talk, I will showcase various structural studies of ferroelectrics like bismuth ferrite, potassium sodium niobate and barium titanate. I will explore how the type, quantity and dynamics of structural defects impact local material properties, offering the potential to tailor these properties.
Design of functional metal-organic frameworks through computational crystal structure prediction
Metal-organic frameworks (MOFs) are highly versatile materials with diverse functional applications in gas storage and separation, catalysis, water purification and sensing, to name a few. The design of new MOFs is a challenging task, heavily reliant on experimental...
