Quantum materials show their true colors

Monday 29 April 2024, 10 am

In the past two decades, condensed matter physics has subtly changed from studying the principles of electronic order in ‘the many-body problem’ to searching for new orders in artificially generated quantum materials. 
Examples, include heterostructures of atomically thin van der Waals materials, artificial atomic lattices, or qubit-based analogues. A second breakthrough is the recognition that discrete symmetries can be used to create unique, topologically protected states and a significant effort is currently focused on the intersection of these research fields.   

Optical spectroscopy is a powerful tool that probes the interactions underlying ordered electronic phases. Signatures of correlations show up as subtle color changes that arise from the correlations between low and high energy degrees of freedom that are thought to be unique to correlated electron systems. With cuprate high temperature superconductors and transition metal dichalcogenides as an example, I will show how changes across the optical spectrum from the far infrared to UV provide detailed insight in the energetics underlying phase transitions. 

In the remainder of the talk, I will discuss new experimental tools that can be used to probe artificial quantum materials. I will highlight future directions for research and some potential applications of these exciting quantum states in novel technologies.

dr. Erik van Heumen - UvA
Monday 29 April 2024, 10 am
dr. Erik van Heumen- UvA
Huygens building, HG00.062