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【学术视频】北京大学量子材料科学中心报告 | 清华大学杨乐仙教授

KouShare 蔻享学术 2021-04-25


图 |  杨乐仙教授

题   目:TrARPES Studies on Correlated Materials

人:杨乐仙

单   位:清华大学

时   间:2019年2月27日

地   点:北京大学

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报告摘要


With the unique capability of tracking the dynamic evolution of electronic structure in the time domain, time- and angle-resolved photoemission spectroscopy (trARPES) has become a more and more important research technique in condensed matter physics. In this talk, I will introduce our recent work in correlated materials. In iron based compounds, we observe ultrafast coherent modulation of the electronic structure and possible metastable states. In the canonical charge density wave materials Rb0.3MoO3 , we observe ultrafast laser induced melting of the long-range order, which precedes the response of coherent nuclear atoms. We argue that the incoherent lattice phonons play decisive role in the melting of the charge-density wave in Rb0.3MoO3 , which should be generically considered in the study of laser induced phase transitions.

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个人简介


Lexian Yang graduated from Fudan University with a PhD degree in physics. He worked as a postdoctoral researcher with Humbold fellowship in Kiel University from 2011 to 2014. He became an assitant professor in Physics department, Tsinghua University in 2016 and is an associated professor since 2019. His main research interest is the electronic structure of quantum material on ultra-short time scale and microscopic spatial scales.

—— ——往期精彩回顾—— ——

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● 北京大学量子材料科学中心学术报告视频--Ning Wang: Probing quantum transport in atomically thin semiconducting transition metal dichalcogenides

● 北京大学量子材料科学中心学术报告视频--宋凤麒:团簇科学走向原子制造

● 北京大学量子材料科学中心学术报告视频--于国强:Spin-orbit torques and skyrmions in magnetic hybrid structures


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