报告介绍 Abstract： The global energy supply is transforming from conventional fossil energy to sustainable energy. Sustainable energy species, for example, solar, wind, and hydro energy, are in an unsteady state and fail to provide a stable energy supply. Energy storage systems are able to collect these unsteady state energies and output as stable energy supply. Electrochemical capacitor is recognized as pr...

报告介绍 Abstract： 　　There is an ongoing drive to replace the most common transparent conductor, indium tin oxide (ITO), with a material that gives comparable performance, but can be coated from solution at speeds orders of magnitude faster than the sputtering processes used to deposit ITO. Metals nanowires are currently the only alternative to ITO that meets these requirements. This presentation wil...

报告介绍 Abstract：　　The spectacular progress in controlling the electronic properties of graphene has triggered research in alternative atomically thin two-dimensional crystals. Monolayers (ML) of transition-metal dichalcogenides such as MoS2 have emerged as very promising nanostructures for optical and electronic applications for mainly two reasons. First, the indirect bulk semiconductor MoS2 becomes dir...

报告介绍 Abstract： 　　In this talk, I will first review the progress which has been made in the past two decades for the Mott transition in single-band Hubbard model. Then I will introduce three new phenomenons existing only in multi-orbital systems, namely the orbital selective Mott transition, the Hund's metal phase and the interaction enhanced spin-orbital coupling. Two popular computational tools in th...

报告介绍 报告摘要： 　　Due to their fantastic electronic properties and promising applications, Z2=1 topological insulators have generated considerable attentions. In this talk, we study the disorder effects in various Z2=0 topological systems. In Z2=0 HgTe/CdTe quantum wells and Graphene with adatom systems, we find the random Anderson disorder (or adatom distribution) leads to a novel quantum transition: ...

报告介绍 报告摘要： 　　Since its discovery one century ago, a deep and, up to now, unresolved controversy remains on the nature of the water vapour continuum. The atmospheric science community has largely sidestepped this controversy, and has adopted a pragmatic approach: most radiative transfer codes used in climate modelling, numerical weather prediction and remote sensing are based on a semi-empirical fo...

报告介绍 报告人简介：　　麻生明，有机化学家，中国科学院上海有机化学研究所研究员。主要从事联烯及其类似物化学方面的研究。引入亲核性官能团，解决了联烯在金属催化剂存在下反应活性及选择性调控，为环状化合物的合成建立了高效合成方法学；发展了从2，3－联烯酸合成γ－丁烯酸内脂类化合物的方法；建立了过渡金属参与手征性中心形成的一锅法双金属共催化的合成方法。同时，实现了同一底物中几种碳－碳键断裂间的选择性调控，提出了...

报告介绍 报告人简介：　　南策文，中国科学院院士，发展中国家科学院院士，材料科学专家，清华大学材料学院教授。　　1982年和1985年分别于华东理工大学获学士和硕士学位，1992年获武汉理工大学(在职)博士学位。曾任清华大学材料系系主任。现任清华大学材料科学与工程研究院院长，兼任国际陶瓷联盟(ICF)理事长、中国硅酸盐学会副理事长等，曾任亚洲电子陶瓷协会主席等。任“功能陶瓷”学科方向国家973计划项目首席科学家(自2002年-...

报告介绍 报告摘要： 　　We employ energy, momentum, and time resolved multi-photon photoemission spectroscopy to probe the coherent response of metals at optical frequencies. Although the reflection of light from a metal is considered to be an essentially instantaneous process, photoelectron spectra excited with tunable laser sources are able to select particular components of the response that are subject t...

报告介绍 报告摘要： 　　Aerosol (particulate matter) plays key roles in air quality, visibility, human health and global climate. Fine particulate matter (PM2.5) has become the primary air pollutant in many Chinese cities which has drawn significant attention. On the other hand, it brings a good opportunity for both fundamental and applied research. In the talk, I will summarize challenges we ...

报告介绍 报告摘要： 　　基于周期极化铌酸锂波导的量子频率转换在量子信息的研究中有重要应用，它可以提供高探测效率的通信波段上转换单光子探测器，自由空间、量子存储器和地面光纤的接口等。本报告将介绍基于周期极化铌酸锂波导的量子频率转换的基本原理，波导的制成，以及基于波导研制成功的上转换探测器及其应用。报告人简介：　　张强，中国科大教授，中科院“百人计划”入选者,科技部973青年项目首席科学家。2006年7月获中国...

报告介绍 Abstract: 　　Owing to the specific two-dimensional (2D) confinement of electron motion and the absence of interlayer perturbation, 2D semiconductors possess unique optoelectronic properties and has become a research hot-spot in recent years. Whereas the electronic and luminescent properties of 2D transition metal dichalcogenide (TMDC) nanosheets, say, MoS2, MoSe2, WS2, etc., have been generating mu...

报告介绍 Abstract: 　　First, I will introduce the itinerancy enhanced quantum fluctuation of magnetic moments in iron-based superconductors. We demonstrate the active role of electron itinerancy in modulating strong anisotropic quantum spatial fluctuation and tuning the ordered anti-ferromagnetic moments. This is performed by first integrating out the itinerant degree of freedom of a degenerate spin-fermion...

报告介绍 报告摘要： While a few large species within partially hydrolyzed aluminum solutions of the Keggin type have been isolated and structurally characterized (e.g., epsilon-Al13, delta-Al30, Na-delta-Al13), other known isomers, while speculated, have not yet been identified. The current work utilizes a novel synthetic method first enabling the synthesis of Keggin-type Al structures at high concentrations...

报告介绍 报告摘要： In this presentation, I will summarize surface science studies addressing a prototypical model oxide system – the rutile TiO2(110)–(1 × 1) surface. The identification of point defects on the terraces such as oxygen vacancies, hydroxyl groups, and near surface defect such as Ti interstitials will be discussed. Using high-resolution scanning tunnelling microscopy (STM) sev...

报告介绍 Abstract: 　　Spin photocurrents induced by optical excitation with circularly polarized radiation in semiconductors are reviewed. The absorption of circularly polarized light results in optical spin orientation due to the transfer of the angular momentum of photons to electrons, which causes a directed motion of electrons in unbiased semiconductors. A characteristic feature of this spin photocurren...