报告介绍 报告摘要：　　Since the discovery of superconductivity at 80 K in single crystals of La3Ni2O7 at pressures above 14.0 GPa [1-5], extensive efforts have been made to understand the properties of the bilayer nickelate system at both ambient and high pressures. CDW, SDW, structural transition, strange metal behavior, orbital dependent correlations, etc. which are profound in copper oxide...

报告介绍 Abstract：　　The transition to a low carbon economy to avoid climate crisis requires green hydrogen, fuel cells and carbon capture. These technologies are necessary for the decarbonization of the sectors of our economy that are inaccessible by renewable electrons, such as chemical synthesis, long-haul heavy duty commercial transportation, and massive, long duration energy storage. For the past 15+ ...

报告介绍 报告摘要：　　层状磁性拓扑材料是当前凝聚态物理研究领域热点体系，其丰富的物理性质对基础研究及实际应用都具有重要意义。本报告将介绍课题组在层状磁性拓扑材料中观察到巨大的磁畴壁反常霍尔效应、通过调制磁性拓扑材料自旋结构导致的巨大拓扑霍尔效应等方面的最新进展。此外，本报告还将介绍探索非中心对称超导方面的一些进展。参考文献[1] Wei Xia & Yanfeng Guo, et al. arXiv:2312.07336. PRL, under revision[2] We...

报告介绍 Abstract： 　Topological magnetic textures or multidimensional magnetic topological defects are currently of great interest in condensed matter physics due to their rich science and potential applications in information technology. In contrast to two-dimensional chiral magnetic skyrmions, which are currently under intense scrutiny both theoretically and experimentally, their three-dimensional (3D) c...

报告介绍 Abstract:　　Ferromagnetic van der Waals (vdW) compounds, such as Fe3GeTe2 (FGT) and its variants with Ga, have sparked considerable interest due to their itinerant magnetism, correlated state, and high magnetic transition temperature. Experimental studies have demonstrated the tunability of FGT's Curie temperature, TC, through adjustments in quintuple layer numbers (QL) and carrier concentratio...

报告介绍 报告摘要：　　2023年，基于受限薛定谔费米子的量子点研究被授予了诺贝尔化学奖。量子受限系统的性质极大地依赖于受限准粒子类型，而基于量子受限狄拉克费米子的研究还开展得非常少。在本报告中，我将简要介绍我们基于受限狄拉克费米子实现的一系列新奇量子物态，包括回音壁模式受限态、原子塌缩态、和分子塌缩态等。并重点介绍量子相位对受限狄拉克费米子的影响和基于受限狄拉克费米子发展的在纳米尺度测量材料简并度的方法。最后，...

报告介绍 Abstract　　Single molecule study, where science and engineering converge, applies the tools and measurement techniques of nanoscale physics and chemistry to generate remarkable new insights into how physical, chemical, and biological systems function. It permits direct observation of molecular behavior that can be obscured by ensemble averaging and enables the study of important problems ranging fr...

报告介绍 Abstract:　　In a recent work [1], we have established the foundations of a U(1) x SU(N) gauge invariant quantum kinetic theory of general N-bands electron systems, driven by classical electromagnetic fields slowly varying in time and space on atomic scales. In this talk, we will start with a general overview of the salient new features of this formalism, insisting on how we have recently extended i...

报告介绍 报告摘要：　　分数量子霍尔效应是当代凝聚态物理的前沿研究热点之一，起源于电子的关联效应，导致了拓扑序的产生，大量的实验研究围绕费米子分数量子霍尔态的拓扑性质而展开。一个自然的问题是：能否在玻色子系统中产生分数量子霍尔效应？人们尝试在冷原子系统中开展研究，但仍处于探索阶段。另一方面， Haldane对分数量子霍尔效应提出了新的量子几何描述，超越了传统拓扑量子场论框架，其直接表现是分数态的引力子模，但实验证据始...

报告介绍 Abstract:      　　Topological orders characterized by long-range quantum entanglement can emerge either from frustrated quantum magnets or correlated fermions. Typical examples include the fractional quantum Hall states and the quantum spin liquids, which have been extensively studied over the last decades. In this talk, I will give an overview of my recent studies. Some di...

报告介绍 报告摘要：　　塑料是现代社会中不可或缺的组成部分，然而大量塑料在一次使用后掩埋或焚烧，造成严重的塑料污染。其中，聚烯烃类塑料（聚乙烯PE，聚丙烯PP）约占城市塑料垃圾总量的57%，且结构稳定，难以降解和回收。基于聚烯烃塑料回收的重要性和难点，开发高效的化学回收技术，将聚烯烃废塑料催化降解转化为高附加价值的清洁燃油、精细化工品和功能材料极具挑战并受到人们的广泛关注。报告对目前商品塑料，特别是聚烯烃的化学回收...

报告介绍 报告摘要：　　全球每年的塑料产量超过4亿吨，其中以聚乙烯和聚丙烯为主的聚烯烃塑料占到一半以上。使用后的塑料制品大部分被弃置，造成资源浪费和环境污染。废弃塑料的有效转化利用能带来可观的经济、社会和环境价值。在分子结构上，聚烯烃只有饱和C-H和C-C键，类似烷烃分子，因此其催化解聚与烷烃分子的催化裂化具有极大相似性。本报告将石油化工中的烷烃催化转化与聚烯烃分子催化解聚在分子转化层面进行对比，从热力学、动力学、...

报告介绍 报告摘要：　　报告分为三部分，1.智能高通量的催化剂合成和筛选系统；2.基于可控C-C偶联的高选择甲醇制乙烯（MTE）新路线；3.选择性甲烷氧化偶联(SOCM)催化体系的构建与机理研究。报告人简介：    范杰教授长期从事碳基能源催化和多相酶催化研究，曾获得了全国百篇优秀博士论文奖，入选2010年教育部新世纪优秀人才计划，荣获2011年度“中国化学会青年化学奖”，2012年获得国家自然科学基金优秀青年科学基金和浙江省...

报告介绍 报告摘要：　　胶体量子点是一类溶液法制备和加工的低维半导体材料，它具备丰富的光物理和光化学性质，在量子信息和能源技术领域具有广泛的应用前景。我们团队近年来基于先进的时间分辨谱学方法，系统研究了量子点的超快光物理与光化学动力学：发展了圆偏振瞬态磁光技术用于研究自旋动力学，观测到激子精细能级劈裂与量子拍频新机制，初步实现了自旋室温相干操控，对室温量子技术发展具有重要意义；深入系统研究了量子点-有机分子三...

报告介绍 报告摘要：　　正如英国剑桥大学Humphreys教授所言：“晶体就如人一般，正是因为有了缺陷才变得有趣”。无论是金属还是半导体，现代材料研究很大程度是围绕缺陷而展开的。通过研究材料复杂微观结构中的各种缺陷，我们可以更好地理解和调控材料的宏观性质，从而实现高性能材料的设计。近年来，基于量子力学的第一性原理计算被广泛地运用于材料缺陷的研究，成为了与实验表征平行的研究手段，为理解和调控原子尺度上难于实验观测的缺陷...

报告介绍 报告摘要：　　Transparent conducting materials (TCMs) are widely used in optoelectronic devices, including solar cells, touch screens and smart windows. TCMs combine two seemingly contradicting properties, i.e., high electrical conductivity and high visible light optical transmission and the origin of their unusual physical properties remains inadequately understood. In this presentation, I will pro...