Physics & Astronomy Quantum Nano Seminar-Prof. Vincent Meunier, Penn State Univ.

Title: "Raman Scattering in Low-Dimensional Materials: a Modeling Perspective"

5/23/2023
3 pm - 4 pm
Location
Wilder 102 and Zoom
Sponsored by
Physics & Astronomy Department
Audience
Public
More information
Tressena Manning
603-646-2854
Abstract: Due to spatial confinement, low-dimensional materials have attracted significant attention as emerging quantum materials. Thanks to spectacular progress in the development of atomically precise bottom-up synthesis methods, accurate knowledge of atomic content and configurations is now readily available, making it possible to create a strong link between theoretically predicted properties and their experimental observation. Several characterization techniques have been employed to improve the understanding of these materials, to establish their crystal structure, purity, and internal configurations. In particular, Raman spectroscopy has demonstrated that structural vibrations are reliable indicators of their structure and, in turn, of their fundamental properties.
 
In this talk, I will provide an overview of the theoretical and computational research performed in my group in the area of phonon calculations and demonstrate how quantum mechanical studies and Raman scattering are combined to determine the fundamental structural properties in an array of low-dimensional materials. In addition to discussing examples of such studies performed on twisted bilayer systems, transition metal dichalcogenides, graphene nanoribbons, and quantum dot over the past few years, I will also briefly discuss our ongoing efforts in the use of high-throughput and machine-learning methods and discuss the importance of ultra-low-frequency vibrational modes in the study of these materials. At the end of the talk, I will also present recent results obtained on TERS (tip enhanced Raman spectroscopy).
 
Hosted by Andrew Cupo & Professor Lorenza Viola
 

Join Zoom Meeting
https://dartmouth.zoom.us/j/91597901421?pwd=eWZBU1RoRWNoaFpXQXV2Q0R6UC9rQT09

Meeting ID: 915 9790 1421
Email physics.department@dartmouth.edu for passcode

 
Location
Wilder 102 and Zoom
Sponsored by
Physics & Astronomy Department
Audience
Public
More information
Tressena Manning
603-646-2854