Research · past
Momentum-Resolved EELS of Two-Dimensional Quantum Materials
Studying low-energy collective excitations in low-dimensional quantum materials through momentum-resolved electron energy-loss spectroscopy.
Overview
My undergraduate research examined low-energy electronic excitations in two-dimensional quantum materials using momentum-resolved electron energy-loss spectroscopy. This work treated the spectrum as a joint function of momentum transfer and energy loss rather than as a single local spectrum.
Question
The central question was how collective excitation branches and their spectral signatures change with momentum. The project focused on extracting physically meaningful trends from momentum-dependent spectra.
Approach
The analysis combined spectral normalization, peak tracking, lineshape fitting, and dispersion extraction across momentum-resolved datasets. The work established the experimental and analytical foundation for my continuing interest in electron spectroscopy of quantum materials.
Open-source code
q-EELS Plasmon Dispersion Toolbox is my open-source MATLAB toolkit for q-EELS data processing and dispersion analysis. It provides an interactive workflow for denoising, optional background subtraction, peak fitting, dispersion extraction, diagnostic checks, and reproducible data export.