时间：2022年5月31日（周二） 14:00-15:30

Time: 14:00-15:30, Tuesday, May 31st, 2022

主持人: 西湖大学理学院PI 徐水钢 博士

Host: Dr. Shuigang Xu, PI of School of Science, Westlake University

地点：西湖大学云栖校区4号楼211会议室

Venue: Room 211, Building 4, Yunqi Campus

线上：腾讯会议 ID：554 258 003 密码：202205

Online：Tencent Meeting ID: 554 258 003 Password: 202205

主讲嘉宾/Speaker：

林熙 教授

长聘副教授

北京大学量子材料科学中心

主讲人简介/Biography:

Professor Xi Lin is an associate professor at International Center for Quantum Materials, Peking University. He obtained his B.S. from University of Science and Technology of China in 2003 and Ph.D. in Physics from the Pennsylvania State University in 2008. His research interests include quantum transport in mesoscopic devices and experimental development at ultralow temperatures. From 2011 to 2020, he designed and built a cryogen-free adiabatic nuclear demagnetization refrigerator and accomplished a temperature down to 0.090mK. 

讲座摘要/Abstract:

Quantum information can be coded by the topological protected edges of fractional quantum Hall states. Investigation on fractional quantum Hall edges in the hope of searching and utilizing non-Abelian statistics has been a focused challenge for years. Manipulating the edges, e.g. to bring edges close to each other or to separate edges spatially, is a common and essential step for such investigation. In this talk, I will report a series of unexpected plateaus in a confined single-layer two-dimensional electron gas, observed through transport measurements at ultralow temperatures. These plateaus are quantized at puzzling fractions such as 3/2, 17/11 and 16/13. By assuming a filling factor mismatch, those anomalous fractions can be understood and the edge structures of the 5/2, 5/3, 8/5 and 7/5 states in the dimension of ~1 micron can be probed. 

讲座联系人/Contact:

理学院 廖老师 liaochangdan@westlake.edu.cn