本會與國家裡論科學研究中心自2025年1月起推出 「Mixed-Gen Lecture Series」演講，將以線上演講方式進行，第三場演講將於2025年7月22日下午4點線上進行(Webex)。
形式：
引言演講：資深學者擔綱，以宏觀面向介紹該次專題演講之研究現況與發展 (20 分鐘)。
專題演講：年輕研究學者的研究工作 (45分鐘) + Q&A 25分鐘。
本場演講語言: 中文。
引言人：中央研究院原子與分子科學研究所 許良彥副研究員
題目：The Story of Topological Science
演講者：國家理論科學研究中心物理組 劉采容博士
演講題目：Structure-imposed Electronic and Topological Properties in One- and Two-Dimensional Conjugated Carbon Systems
會議號：2557 864 6459
密碼：mMfYNv5w4a3
摘要:
The electronic and topological behaviors of π-conjugated carbon materials are
strongly governed by their geometric structures—particularly lattice
symmetries and edge terminations. Graphene, with its honeycomb lattice, is a
well-known example that hosts massless Dirac fermions and exhibits non-
trivial topological phenomena. However, beyond the honeycomb structure, a
vast number of mathematically possible lattices exist. Recent advances in
bottom-up synthesis techniques have made it feasible to construct a wide
range of two-dimensional (2D) polymers and nanoribbons with well-defined
edge conformations. These approaches avoid the synthetic challenges
typically associated with highly strained three- or four-membered ring systems
in carbon allotropes. As such, understanding how structural variations
influence electronic and topological properties is an important consideration in
the design of new materials.
Among theoretical methods, the tight-binding (TB) approach offers an
effective method for investigating the electronic and topological properties of
π-conjugated systems. Its simplicity enables clear insights into the
relationship between geometry and electronic behavior, making it especially
useful for early-stage material exploration. In this presentation, I will
demonstrate how the TB method can be used to link structural features to
electronic characteristics, and how this foundational understanding not only
facilitates rapid screening of candidate structures but also serves as a guiding
step toward more complex systems or higher-level calculations, such as
density functional theory (DFT).