Atomic-Resolution Imaging in Scanning Transmission Electron Microscopes

Abstract: 

Aberration-corrected scanning transmission electron microscopy (STEM) provides atomic-resolution images of materials and devices, leading to novel insights into their structure, chemistry and bonding. This talk will provide a broad overview on the various imaging and spectroscopy modes within STEM and how they can be used to map various key quantities and phenomena in materials, including dislocations, strain, structural phase transitions, and electronic states. Methods for sample preparation and data analysis will be discussed. Moreover, in situ sample environments now enable imaging under external stimuli (cryogenic cooling, electric biasing, heating), leading to more detailed understanding of the function of materials. Finally, I will review STEM and sample preparation capabilities within UBC.

Speaker:

Ismail El Baggari is an Assistant Professor in Physics & Astronomy and Principal Investigator at the Quantum Matter Institute at UBC. He received his PhD in Physics from Cornell University and previously led an independent research group at the Rowland Institute at Harvard. His research focuses on the development and application of in situ cryogenic electron microscopy for imaging quantum materials and devices at the atomic scale. El Baggari is a member and part of the management team of the Characterization@UBC Cluster.