报告介绍报告摘要：　　Over the past decade, we have developed universal strategies (e.g. graded/varying strain, surface/interfacial chemistry, non-equivalent superlattice) to artificially control materials’ symmetry and symmetry break for the emergent phenomena and functionalities, such as magnetoelectric phase transition or topological spin textures, etc. In this presentation, I will share with you one strategy for...

报告介绍报告摘要：2D systems can not only have physical properties distinct from those of 3D materials but also allow control/manipulation of their properties through stacking. For example, Mott insulating and superconducting states, unavailable in single layer graphene, are realized in twisted bilayer graphene. While these novel 2D systems are mostly obtained through exfoliation of van der Waals materials, a more co...

报告介绍报告摘要：大容量的信息高速处理要求将光子和电子二大信息载体高效融合在一起，产生新一代的高性能微纳光电子器件与集成芯片。然而，微纳光子和电子在波长尺度上的巨大失配使光-电的高效融合极为困难，因为这种失配会导致光子产生的随机辐射和光子传输的随机散射，以及抗光子局域的泄露。报告将从三个方面介绍如何使微纳光子高效的有序化和局域化：一是构建并利用空间高对称点场和涡旋光场将随机辐射的光子调控为有序光子流，实现有“里程碑”...

报告介绍报告摘要：负载型金属催化剂在精细化学品合成领域具有广泛应用，特别是在工业加氢过程中发挥着重要作用。然而，这类催化剂在含有强吸附质分子的加氢体系中面临显著挑战。以含氮杂环化合物（如吡啶、喹啉）及胺类分子为例，其氮位点会优先占据金属活性位点，形成致密分子吸附层，阻碍氢气吸附，从而导致催化剂活性降低1-2个数量级。此外，强吸附质分子与金属表面的强配位作用会破坏金属-金属键，引发金属流失。开发兼具高活性和高稳定性的负载型...

报告介绍报告摘要：Altermagnet is a newly discovered class of antiferromagnets characterized by nonrelativistic spin-split bands, opening a new frontier in quantum materials. In this talk, I will discuss two key aspects of altermagnetism. First, I will show how altermagnetism enables novel quantum phenomena: (i) the emergence of nonrelativistic spin-orbital locking/textures governed by spin group symmetry [1]; and (ii...

报告介绍报告摘要：　　Weyl semimetals are crystals where electronic quasiparticles take the form of Weyl fermions [1]. Such emergent Weyl fermions are massless, chiral and topological—potentially useful for circuit interconnects, ultrafast THz detectors and topological transistors. Despite these promising applications and a decade of intense worldwide research, our best Weyl semimetals to date are in fact basically m...

报告介绍报告摘要：In this talk, I report our research on superconductivity,especially our efforts on understanding the mechanism of high-temperature superconductivity in organic superconductors and cuprates. For organic superconductors, we carried out an extensive numerical study on the polycyclic aromatic hydrocarbon (PAH) superconductors, starting from C6H6(single benzene ring) to C30H18(seven benzene rings), and w...

报告介绍Abstract：　　Flat band (FB) systems provide ideal playgrounds for studying topological and correlated physics. However, multi-orbital characteristics in real materials are distinguished from most simple FB models. In this talk, I will introduce a general scheme to obtain FBs. Starting from the foundation of lattice flat bands hosting compact localized states (CLSs), we generally prove that any CLS can be sym...

报告介绍Abstract：Light-matter interaction is essential for mechanisms such as luminescence, photosynthesis, and energy harvesting, defining the emission characteristics of molecular systems and governing the conversion of energy between photons and electrons. While these processes are intensively studied and employed, little is known about their dependence on atomic-scale properties since reaching such precision in ...

报告介绍Abstract：　　Since the initial introduction of confocal Raman microscopy in the late 1970ies, there was a push for higher and higher spatial resolution in vibrational, specifically Raman spectroscopy. The experimental realization of sub-diffraction limit optical resolution, started the advent of near-field optics and allowed resolutions in the range of 100 nm. Application to Raman spectroscopy required to a...

报告介绍报告摘要：　马约拉纳费米子是由物理学家马约拉纳（E. Majorana）于1937年预言的一种基本粒子，具有电中性且反粒子是其自身。在凝聚态物理的材料体系中，被拓扑缺陷束缚的马约拉纳准粒子，其产生湮灭算符满足自共轭关系，通常呈现出零能电导信号，被称为马约拉纳零能模，亦称“任意子”。理论证明，马约拉纳零能模满足非阿贝尔统计规律，对其进行编织操作，被认为是实现容错拓扑量子计算的主要路径之一。发现马约拉纳零能模，是世界科技前沿竞...

报告介绍Abstract：　　Delafossite metals ABO2 are known for their rich properties [1] and potential for realizing directional ballistic transport. This talk focuses on the surface properties of PdCoO2 and PdCrO2. First, I will report on the STM findings from their oxide-terminated surfaces [2,3], particularly on a rarely observed short-range charge order formed on the CrO2-terminated surface of PdCrO2 that, owing to ...

报告介绍报告摘要：安徽吸收谱仪器设备有限公司首席科学家柳守杰副教授，将分享其依托前沿高端科学仪器的创业之路。作为深耕XAFS 技术领域的科研工作者，他基于对国内材料结构分析设备“卡脖子”痛点的深刻洞察，于2022 年牵头创立公司，开启高端实验室检测仪器国产化攻坚。演讲将回顾公司成立以来的发展历程：从突破台式X 射线吸收精细结构谱仪（RapidXAFS）核心技术瓶颈，实现90% 部件自主研发，到形成多型号产品矩阵，累计获20 余项发明专利、交付超...

报告介绍Abstract：　　Atomic-layer-by-layer molecular beam epitaxy (ALL-MBE) is a new technique developed in the last few decades to synthesize functional quantum materials, including high-temperature superconductors (HTS), other complex oxides, and two-dimensional materials such as graphene and borophene. It also enables one to synthesize novel metastable materials that cannot be synthesized by standard methods. Sev...

报告介绍报告摘要：微米尺度界面展现出独特的尺度效应和化学特性，比如近年来实验发现，将体相溶剂通过喷雾、悬浮等简单方式分散为微米级液滴，可以显著加速有机化学反应。这使得微液滴有望作为高效反应器，广泛应用于绿色有机合成、纳米材料制备、高通量分析等领域。微液滴加速化学反应的现象引起了广泛关注，但其加速机制还未完全阐明。诸多因素可能影响微液滴中的化学反应动力学，包括界面电场、界面极端pH、部分溶剂化作用，以及界面自发氧化还原反...

报告介绍报告摘要：　　For large and complex photochemical systems, on-the-fly trajectory surface hopping molecular dynamics, in which nuclear motions are governed by Newton’s equations, provides an effective approach for simulating nonadiabatic molecular dynamics. However, the nonadiabatic transition probability, which originates from a purely quantum effect, must be derived from quantum dynamics. In the mixed quant...