Postdoctoral Research Associate - STEM for Quantum and Energy Materials
Dr. Kartik Venkatraman is a Postdoctoral Research Associate in the Scanning Transmission Electron Microscopy Group at ORNL's Center for Nanophase Materials Sciences. He received his Ph.D. in Materials Science and Engineering from Arizona State University in August 2020. His Ph.D. research focused on developing insights into the spatial resolution of vibrational electron energy-loss spectroscopy (EELS) conducted in a scanning transmission electron microscope (STEM). His postdoctoral research focuses on applying the various modalities of monochromated STEM EELS to characterize complex phenomena in energy and quantum materials at the nanometer to atomic spatial scale. Specifically, he has been using vibrational EELS to study how Li-ion transport properties vary at individual nanoscale interfaces in battery materials. He is also using spatially- and momentum-resolved monochromated EELS to study the excitation of phonons, plasmons, and other optoelectronic excitations across a Moire superlattice unit cell in twisted bilayer heterostructures.