Optical imaging of flavor order in flat band graphene
Tian Xie
Richen Xiong
et-al
We describe an optical technique that sensitively and selectively detects flavor textures via the exciton response of a proximal transition metal dichalcogenide layer (WSe2). Through a systematic study of rhombohedral and rotationally faulted graphene bilayers and trilayers, we show that when the WSe2 is in direct contact with the graphene, the exciton response is most sensitive to the large momentum rearrangement of the Fermi surface, and thus flavor orders. The wide-field imaging capability of optical probes allows us to obtain spatial maps of flavor orders with high throughput, and with broad temperature and device compatibility.
Authors
HQI Postdoctoral Fellow
I am an experimental physicist and HQI Postdoctoral Fellow at Harvard University studying how light–matter interactions uncover new physics in quantum materials. My work spans microwave to ultrafast optical spectroscopy to track dynamical many-body states, with a focus on harnessing native entanglement and coherence in correlated materials to expand the frontiers of quantum sensing and quantum information science.