Capturing Excitons and Phonons in Quantum Materials

The interplay of spin, lattice, orbital and charge degrees of freedom controls most of the emergent properties in quantum materials. The detection of these parameters at the atomic scale can unravel novel structure-property relationship that could be used to create interesting device architectures. The recent developments of direct electron detectors in analytical scanning transmission electron microscopy (STEM) have made the detection of subtle electronic and structural features in quantum materials possible. In this talk, I will enlighten the contribution of our group towards measuring subtle features in quantum materials from 1) unravelling light-matter interactions in the twisted moiré materials, to 2) exploring vibrational properties across ferroelectric and multiferroic domain walls. I will end my talk with the current and future challenges that we need to address to unravel atomic scale structure-property relationship in quantum materials.