【学术视频】纪念黄昆先生诞辰一百周年暨半导体学科发展研讨会 | 北京大学王健教授

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图 | 王健

题   目：对数量子振荡的发现

报告人：王健

单   位：北京大学

时   间：2019-09-03

地   点：北京西郊宾馆

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报告摘要

It is well known that there are two classes of quantum oscillations. One is magnetic field B periodic oscillations, such as Aharonov-Bohm effect for mesoscopic system and Little Parks oscillations for superconducting systems. The other one is 1/B periodic Shubnikov-deHaas and deHaas van-Alphen oscillations from quantized Landau levels. We discover a new class of quantum oscillations beyond quantum limit in topological materials by magnetoresistance measurements up to ultrahigh magnetic field, which show exotic log B periodic oscillations, i.e. discrete scale invariance. The observed log B quantum oscillations can be explained by relativistic quantum quasi-bound states of supercritical atomic collapse and have been further detected in Hall traces of different topological materials. 

个人简介

Jian Wang, Changjiang Distinguished Professor of China's Ministry of Education, received his bachelor's degree in Physics from Shandong University in 2001, and PhD degreein condensed matter physics from Institute of Physics, Chinese Academy of Sciences in 2007. From 2006 to 2011, he worked as a Postdoc and Research Associate at Penn State University, USA. He became a tenure-track Associate Professor and established a research group at Peking University in 2010. In 2017, Jian Wang was promoted to Professor. He was selected to Changjiang Distinguished Professor of China's Ministry of Education in 2016 and Chief Scientist for National Key R&D Program of China in 2018. He won Sir Martin Wood China Prize in 2015. His current research interests are quantum transport properties of low dimensional superconductors and topological materials. Jian Wang with collaborators discovered log-periodic quantum oscillations in a solid state system, quantum Griffiths singularity in 2D superconductors, and tip-induced unconventional superconductivity in topological materials. Furthermore, as the leader Jian Wang also for the first time revealed interface-modulated Ising superconductivity, demonstrated high Tc in one unit cell thick FeSe films by direct transport and Meissner evidences, and detected eletron-electron interaction in topological materials. In recent years, he has authored more than 80 SCI papers including more than 60 corresponding author publications in Science, Science Advances, Nature Materials, Nature Physics, Nature Communications, PNAS, Physical Review X, Physical Review Letters, Nano Letters, Advanced Materials, and ACS nano etc. Jian Wang's lab at Peking University possesses ultralow temperature-high magnetic field measurement systems and low temperature scanning tunneling microcopy/ spectroscopy-molecular beam epitaxy combined ultrahigh vacuum system etc.

会议简介

黄昆先生（1919-2005）是国际著名的物理学家，是中国固体物理学和半导体物理学的奠基人之一。2019年是世界著名物理学家、中国固体物理学和半导体物理学奠基人之一黄昆先生诞辰100周年。黄昆先生曾在中国科学院半导体研究所和北京大学工作，并曾兼任中国物理学会理事长。为了纪念黄昆先生，中国科学院半导体研究所、北京大学、中国物理学会和九三学社联合举办“纪念黄昆先生诞辰100周年暨半导体学科发展研讨会”，纪念他对科学与教育事业的贡献，缅怀他的高尚品格和道德情操，学习他严谨求实的治学态度和实事求是的精神，并研讨当前半导体科技的新进展。

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