2025/12/23(Tue) 10:30 -12:00 五樓第一會議室 5F, 1st Meeting Room
Title
Bridging Experiment and Theory: Exploring Quantum Materials with ARPES and DFT calculations
Speaker
鄭澄懋教授 (國家同步輻射研究中心) Prof. Cheng-Maw Cheng (National Synchrotron Radiation Research Center)Abstract
Angle-resolved photoemission spectroscopy (ARPES) has emerged as a powerful tool for directly probing the electronic structure of solids, offering invaluable insights into quasiparticle dynamics, band topology, and many-body interactions. As an experimental technique, ARPES provides energy and momentum-resolved spectral functions that are often interpreted in conjunction with density functional theory (DFT) calculations. In this talk, I will demonstrate how experimental observations from angle-resolved photoemission measurements can be effectively correlated with density functional theory (DFT) simulations to uncover the underlying electronic properties of quantum materials. Drawing from my research, I will present case studies on topological insulators, nodal-line semimetals (NLS), and a variety of two-dimensional (2D) materials such as β-Sn, hexagonal boron nitride (h-BN), and their heterostructures with topological insulators. These examples highlight the synergy between theory and experiment in understanding band inversion, spin-orbit coupling effects, and dimensionality-driven phase transitions. Through these studies, I aim to showcase how experimentalists can leverage DFT not only to interpret ARPES data but also to guide material design and discovery.
Language
演講語言 (Language): in English
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