【预告】中国科大施汝为系列讲座——刘锋教授：A Unified View of Topological Phase ...

报告直播二维码

此次报告由中科院强耦合量子材料物理重点实验室、中国科大物理系及科研部联合主办，由低温物理学报承办，于2020年7月30日10:00开始。授权蔻享学术进行网络直播。

主题：A Unified View of Topological Phase Transition in Band Theory

主讲人：刘锋 教授

单位：University of Utah

时间：2020年7月30日 10:00-11:00
主办方：中科院强耦合量子材料物理重点实验室、中国科大物理系及科研部
承办方：低温物理学报

报告摘要

We develop a unified view of topological phase transitions (TPTs) in solids by revising the classical band theory with the inclusion of topology. Re-evaluating the band evolution from an “atomic crystal” (a normal insulator) to a solid crystal, such as a semiconductor, we demonstrate that there exists ubiquitously an intermediate phase of topological insulator, whose critical transition point displays a linear scaling between electron hopping potential and average bond length, underlined by deformation-potential theory. The validity of the scaling relation is verified in various two-dimensional lattices regardless of lattice symmetry, periodicity, and form of electron hopping, based on a generic tight-binding model. Significantly, this linear scaling is shown to set an upper bound for the degree of structural disorder to destroy the topological order in a crystalline solid, as exemplified by formation of vacancies and thermal disorder. Our work formulates a simple framework for understanding the physical nature of TPTs with significant implications in practical applications of topological materials, and points to the possible existence of topological liquid. 

主讲人介绍

Feng Liu, Professor of Department of Materials Science and Engineering, Adjunct professor, Department of Physics, University of Utah. He received his PhD in Chemical Physics from Virginia Commonwealth University in 1990. Prof. Liu is a fellow of American Physical Society and recipient of Senior Humboldt Award. His research interest lies in theoretical and computational studies of low-dimensional nano and quantum materials, with a most recent focus on topological materials. He is also a co-founder of two high-tech start-up companies.

—— ——往期精彩回顾—— ——●【学术视频】第九届量子能源国际研讨会 | 美国犹他大学刘锋教授●【圣诞特辑】美国犹他大学材料物理学家刘锋教授与他的音乐故事● 直播回放：中国科大施汝为系列讲座——沈健教授：Complex magnetic domain structures in ...● 直播回放：中国科大施汝为系列讲座——苑震生教授：极度深寒中的超冷原子及其纠缠
●【预告】深度势能-材料模拟应用交流讨论会●【蔻享Jobs】深圳大学物理与光电工程学院王健特聘教授团队招聘● 直播回放：地球化学空中会议室：升维冰雪● 直播回放：南方科技大学吴雷博士：稀薄气体动力学的基本理论、算法及应用● 直播回放：北京应用物理与计算数学研究所许爱国研究员：复杂流动动理学建模研究中相关物理问题的思考● 直播回放：“半语-益言”系列讲座第二期 | 中科院半导体所杨富华研究员：半导体科学技术发展的里程碑

为满足更多科研工作者的需求，蔻享平台开通了各科研领域的微信交流群。进群请添加微信18019902656（备注您的科研方向）小编拉您入群哟！蔻享网站www.koushare.com已开通自主上传功能，期待您的分享！

---

欢迎大家提供各类学术会议或学术报告信息，以便广大科研人员参与交流学习。

联系人：李盼 18005575053（微信同号）戳这里，观看精彩直播哟！