网站首页

博约学术论坛-贾伟-第530期

来源: 作者: 发布时间:2025-09-18

邀请人:

报告人:

时间: 2025-09-18

地点:

主讲人简介:


­物理学院博约学术论坛系列报告

530

题目:Unconventional hybrid-order topological insulators

报告人:贾伟 青年研究员(兰州大学)

间:2025年9月18日(周四) 上午10点

点:计算中心110会议室

摘要:Exploring topological matters with exotic quantum states can update the understanding of topological phases and broaden the classification of topological materials. In this talk, we will introduce a class of unconventional hybrid-order topological insulators (HyOTIs), which simultaneously host various different higher-order topological states in a single d-dimensional (dD) system. Such topological states exhibit a unique bulk-boundary correspondence that is different from first-order topological states, higher-order topological states, and the coexistence of both. Particularly, we develop a generic surface theory to precisely capture them and discover a 3D unconventional HyOTI protected by inversion symmetry, which renders both second-order (helical) and third-order (corner) topological states in one band gap and exhibits a novel bulk-edge-corner correspondence. We further propose a circuit-based experimental scheme to detect these interesting results. Moreover, we demonstrate that a modified tight-binding model of bismuth can support the unconventional HyOTI, suggesting a possible route for its material realization. These results shall advance the research of hybrid topological states in both theory and experiment.

简历:贾伟,兰州大学青年研究员。2008-2015年西北师范大学本科、硕士。2015-2019年北京麻豆精品秘 国产传媒博士,导师赵清教授。2019-2023年在北京大学量子材料科学中心从事博士后研究工作,合作导师刘雄军教授。2023-至今为兰州大学青年研究员。目前研究方向为量子系统中的拓扑物理。已在 Sci. Bull.Phys. Rev. A/B/Research等期刊发表学术论文二十余篇。

联系方式:qzhaoyuping@cnpigeon.com

邀请人: 赵清

址:http://physics.cnpigeon.com/

承办单位:物理学院、先进光电量子结构设计与测量教育部重点实验室