UMD_CMNS_Physics_S1_CMYK

CMTC JLDS Colloquium

Date
Fri, Jan 31, 2025 11:00 am - 12:00 pm
Location
ATL 4402

Description

Speaker: Leonid Glazman (Yale University)
Title: Probing Electrons and Phonons in van der Waals Materials with a Quantum Twisting Microscope
Abstract: We developed a theory of spectroscopy for elementary excitations and their interactions using a novel device, the Quantum Twisting Microscope (QTM). Our theory enables the extraction of information about the electron spectra and wave functions in twisted bilayer graphene from the differential conductance measured by QTM. 
Similarly, we relate the graphene phonon spectra to features observed in the differential conductance measured by QTM. Applying this theory to recent experiments allows us to estimate the strength of the electron-phonon interaction in graphene structures. 
While our current focus has been on graphene, the theory applies to a broader class of van der Waals materials. Future extensions include probing exotic interaction-induced states with broken symmetries, such as flat-band superconductivity in moiré materials.