Events

"New Quasiparticles Revealed by Quantum Interference and Light Scattering"

Talk Abstract: In materials, new quasi-particles can emerge as collective excitations of ordered states. Detecting these modes and their associated properties is an essential step to understanding these new phases. Here, I will discuss the utility of Raman Spectroscopy in detecting the various excitations that emerge in quantum materials. I will focus on our discovery of an Axial Higgs mode emerging from a Charge Density Wave (CDW) in the 2D Material family RTe3. For decades, the CDW in RTe3 was considered conventional. However, using quantum interference and various optical techniques, we have proved that a hidden Ferroaxial order emerges from a combined orbital and charge order. Time permitting, I will also briefly discuss our efforts to use new Dirac quasi-particles in graphene for multiplexed, handheld, biochemical sensors.