SSO Seminar - Kayla Nguyen, Univ of Illinois Urbana-Champaign, ” Probing Quantum Materials with Electrons”

sponsored by “The Flint Fund Series on Quantum Devices and Nanostructures”

 

Mason 107 or via Zoom

Zoom :  https://yale.zoom.us/j/95203899545?pwd=cGVid2VlU0NBUDJkRi85aU5VcDAwUT09

Password: 825310

Meeting ID: 952 0389 9545

Probing Quantum Materials with Electrons

Electron microscopy is transforming the physical sciences. Aided by a new generation of direct imaging detectors, cryo-electron microscopy won the 2017 Nobel Prize in Chemistry for advancements in visualizing biomolecules.  Beyond the structure, the scattered electron beam contains a vast amount of information related to the chemical, electrical, optical, and magnetic properties of matter. To explore these properties, I co-invented the electron microscopy pixel array detector (EMPAD), which is a fast and highly efficient detector designed to capture all of the scattered electron information. In my talk, I will highlight how the EMPAD enables super-resolution imaging using electron ptychography, where conventional electron probes can produce sub-Angstrom resolution without the need for expensive aberration correctors.  This approach will also push the boundaries of imaging and provide new avenues for exploration of emergent physics in quantum materials. Additionally, I will examine the relationship between magnetic skrymions’ vorticity and crystal chirality in B20 FeGe thin films on Si, presenting a novel method for investigating topological magnetism, which is crucial for the development of spintronics and low-power magnetic memory technologies.