自旋轨道转矩、拓扑磁结构、LHAASO、量子纠错 | 本周物理讲座

32D Graphene in a 3D Architecture: New Opportunities from Bicontinuous Nanoporous Graphene

报告人：Dr. Jiuhui Han，Tohoku University, Japan

时间：5月27日（周四）15:00

单位：中科院物理所

参会方式：腾讯会议

会议ID：563 345 409

会议密码：0527

会议链接：https://meeting.tencent.com/l/EJ9zXwpmsRsL

摘要：

Three-dimensional porous materials with bicontinuous open porous structure, large specific surface area, and high electric and thermal conductivities represent a new class of functional materials for a variety of applications. In recent years, we succeeded in constructing 2D graphene into a 3D bicontinuous architecture, leading to the development of 3D nanoporous graphene. Since then, comprehensive studies have been conducted on this new material, ranging from the designable fabrication of 3D nanoporous graphene with tuneable microstructure and physicochemical properties to exploring its wide range of applications for energy conversion and storage, transistor, photodetector, etc. In this talk, I’ll present recent advances in the development of 3D nanoporous graphene for energy applications. The content begins with an overview of this material and its structural and physical features, followed by an introduction to the advanced fabrication techniques that have enabled flexible and precise control over its microstructure and surface chemistry. Subsequently, the applications of 3D nanoporous graphene for electrochemical energy conversions and storage will be discussed.

报告人简介： 

Dr. Jiuhui Han is currently an assistant professor of the Frontier Research Institute for Interdisciplinary Sciences (FRIS) at Tohoku University, Japan. He received his Ph.D. degree in materials science from Tohoku University in 2017. His research mainly focuses on the development of nanoporous materials for energy-oriented applications, and fundamental electrochemical study by in situ transmission electron microscopy.

4半导体量子结构中的自旋及其在自旋与拓扑量子计算中的应用

报告人：徐洪起，北京大学

时间：5月26日（周三）19:30

单位：半导体学报

参会方式：蔻享直播

会议链接：https://www.koushare.com/lives/room/629461

摘要：

半导体中的电子自旋和自旋-轨道耦合及其在量子信息科学领域中的应用是当代前沿半导体物理学的重要研究课题。这个报告将介绍我们近年在半导体低维量子结构中的电子的自旋、自旋-轨道耦合、及自旋关联等研究领域所取得的一些进展，介绍我们在研究构筑半导体量子点自旋量子计算器件，低维半导体-超导体复合量子器件及拓朴量子器件等研究领域所取得的一些进展和所面临的挑战。

报告人简介： 

徐洪起 瑞典Lund大学凝聚态物理学博士，北京大学“博雅”讲席教授，美国物理学会会士（APS Fellow）。曾于1993 年获聘在Lund 大学工作至2014年，历任助理教授 (1995-2001)、副教授(2001-2003)和教授(2003-2014)。2010年获聘入职北京大学，现担任其创建的“半导体纳米结构与量子器件实验室”和“固态量子器件北京市重点实验室”负责人。从事的科学研究领域包括：半导体纳米结构物理与光电性质的实验与理论研究；纳电子学器件与自旋电子学器件的制作、物理与应用研究；新型纳米线LED 和光伏器件的原理与制作技术研究；半导体量子器件的制备、物理机制与应用研究；低维凝聚态系统中的强关联等多体物理现象的实验与理论研究；低维半导体中Majorana 准粒子及拓扑量子器件的实验与理论研究等。

5高海拔宇宙线观测站首批结果：开启“超高能伽马天文学”时代（The first results of LHAASO: Opening The UHE g-ray Astronomy）

报告人：曹臻，LHAASO项目首席科学家、中国科学院高能物理研究所

时间：5月26日（周三）16:00

单位：上海交通大学、李政道研究所

参会方式：蔻享直播

会议链接：https://www.koushare.com/lives/room/215122

摘要：

The Large High Altitude Air Shower Observatory (LHAASO) as the largest ground based Gamma Ray detector array has the 1/2 array operated for months. Many VHE gamma ray sources has been observed including well known sources such as J1809+06 and Mkr421. With many sources found having strong emission of gamma rays in UHE(> 0.1 PeV) band, LHAASO is opened a completely new window of gamma ray astronomy with its unprecedented sensitivity at energies above 10 TeV and extremely high background rejection capability. It has detected super-PeV gamma-like events, including the record high energy of 1.4 PeV in history. With also measured SEDs of several galactic gamma sources above 100 TeV, LHAASO reveals that our galaxy is full of PeVatrons. This enables an exploring for hadronic PeVatrons which are the origin of the cosmic rays, particularly with the operation of the full scale LHAASO array. The experiment status will be updated.

报告人简介： 

曹臻，1982年7月毕业于云南大学物理系，1994年在高能物理研究所获宇宙线高能物理哲学博士。1994年任美国俄勒冈大学物理系研究助理，1998年任美国犹他大学物理系研究助理，2003‐2009年任美国犹他大学副教授。2004年入选中国科学院“引进国外杰出人才（百人计划）”，2008年终期评审获“优秀奖”。2004年起任高能所粒子天体物理中心研究员，博士生导师。2013年起任国家重大科技基础设施项目“高海拔宇宙线观测站”首席科学家、工程经理部经理。2015年入选中国科学院特聘研究员。任中国科学院大学岗位教授。2019年起任高能所“天府宇宙线研究中心”主任。享受国务院政府特殊津贴。自1994年起活跃于国内外宇宙线和伽马天文领域，参与多个国际知名宇宙线实验，领导和设计了多个大型实验及其探测装置，并实施了相关探测器的研制。取得多项重要成果，在国际专业刊物发表了120多篇科学论文，总引用率超过5,500次。从2007年起任中国物理学会高能物理分会常务理事，至2018年任副秘书长。从2014年起任国际纯粹与应用物理联合会（IUPAP）粒子天体物理委员会（C4）成员、粒子天体物理国际委员会（WG10）成员。

7Thermal Hall Phenomenology for the Present and the Future

报告人：陈静远，清华大学

时间：5月28日(周五) 9:30

单位：复旦大学物理系

参会方式：蔻享直播

会议链接：https://www.koushare.com/lives/room/445295

摘要：

Thermal Hall effect is becoming a more and more important experimental approach to probe extrordinary physics in condensed matter systems. In the recent years, unexpectingly large thermal Hall effect has been observed in a few important insulators, creating notable puzzles in the community. In this talk I will explain our physical explanations to these observations, and discuss the follow-up experimental results which verified or can verify our theories. I will also picture the general roadmap towards a better established framework for the phenomenological study for thermal Hall experiments in the future.

报告人简介： 

Jingyuan Chen, is assistant professor at Institute for Advanced Study at Tsinghua University. He got Ph.D at University of Chicago in 2016, did postdoc research at Stanford University, and joined Tsinghua in 2020. His research interestes focus on theoretical condensed matter physics including both formal developments and experimental phenomenologies, formal aspects of quantum field theory, and the connection between quantum information and gravity.