2025/11/11(Tue) 10:30 -11:45 五樓第一會議室 5F, 1st Meeting Room
Title
Topological and Optical Phenomena in Two-Dimensional Quantum Materials
Abstract
Two-dimensional quantum materials provide a fertile ground for exploring how topology, symmetry, and quantum geometry manifest in electronic and optical phenomena. In this talk, I will present our recent theoretical investigations into the interplay between these fundamental aspects, focusing on how microscopic symmetry and topology lead to experimentally accessible signatures.
We study Berry curvature–driven transport, topological edge and corner states, and their photonic counterparts exhibiting symmetry-protected light propagation. Particular attention is devoted to transition-metal dichalcogenides and Janus monolayers, where broken mirror symmetry and strong spin–orbit coupling give rise to optically induced spin Hall currents, nonlinear optical effects, and light-controlled current responses.
These analyses clarify how the topology and geometry of Bloch wavefunctions govern response tensors and observable quantities such as optical conductivity and photocurrent spectra. By linking theoretical frameworks with measurable phenomena, this work aims to deepen the understanding of topological and optical effects in atomically thin quantum systems.
Language
演講語言 (Language): in English