时间：2021年01月19日（周二）下午14:00-15:30

Time：14:00-15:30, Tuesday, Jan. 19^th, 2021

主持人: 西湖大学理学院 吴颉 博士

Host: Dr. Jie Wu, PI of School of Science, Westlake University

地点：西湖大学云栖校区4号楼211会议室，腾讯在线会议

Venue: Room 211, Building 4, Yunqi Campus, Tencent Video Conferencing

线上：腾讯会议直播（会议号：776 504 168）

Online: Tencent Video Conferencing ( Meeting ID: 776 504 168)

主讲嘉宾/Speaker：

于浦 教授

清华大学物理系

主讲人简介/Biography:

    于浦，清华大学物理系教授。2011年毕业于UC Berkeley物理系，获得理学博士学位。2011年至2012年先后在UC Berkeley和RIKEN从事博士后研究。2012年加入清华大学物理系，先后任助理教授、副教授，2018年聘为长聘教授。2014年至今兼任日本理化学研究所Center for Emergent Matter Science兼职研究员。近年来主要致力于复杂氧化物薄膜与异质结构的离子调控及磁电耦合效应研究，在 Nature、Science、Nature系列、Phys. Rev. Lett.、Adv. Mater.等期刊发表学术论文100余篇，总引用数8000余次。研究成果被国际氧化物电子学会（iWOE）评为2018年度 “Excellency in Research Award”，受到2020年度国家杰出青年科学基金资助。 

讲座摘要/Abstract:

    Due to the strong electron-ion interaction, ionic evolutions within complex oxides forms a productive avenue for designing novel material functionalities with extensive applications. In this talk, I will first introduce a simple approach to achieve reversible and nonvolatile electric-field control of oxygen and hydrogen ionic evolutions within the model system of brownmillerite SrCoO_2.5 through ionic liquid gating. Due to the selectively controllable ionic evolutions, we achieved a tri-state phase transformation among SrCoO_2.5, its counterpart of perovskite SrCoO_3-δ and a hitherto-unexplored HSrCoO_2.5 phase with distinct magnetic, electrical and optical properties, which suggest interesting tri-state magnetoelectric and electrochromic effects. Furthermore, the newly discovered HSrCoO_2.5 phase forms a conceptually new solid oxide electrolyte at low temperature region owing to its extremely-high proton concentration and well-ordered vacancy channels. We envision and further demonstrate that the electric-field controlled ionic evolution brings in a new tuning knob to manipulate the coupling and correlation between charge, spin, orbital and lattice degrees of freedom and paves a new playground for the discovery of novel materials with rich functionalities.

讲座联系人/Contact:

    理学院 钟老师 zhongmengzhen@westlake.edu.cn