1从中微子到正负电子对撞
报告人：王贻芳，中科院高能物理所
时间：10月10日（周三）15:00
单位：中科院物理研究所
地点：M楼234报告厅
中微子和电子/正电子都是构成物质世界最基本的单元，在物质结构与宇宙起源中起到最基本的作用。由于我们对中微子的基本性质缺乏了解，还不能完整地构建粒子物理的标准模型。事实上，我们也知道标准模型不是终极理论，应该还有存在着更高能量、更深层次的新物理。正负电子对撞是探究这些问题的最好手段之一。本报告将介绍我们在中微子性质研究及正负电子对撞方面的研究成果及未来设想。
中国散裂中子源园区。来自中科院高能所公众号
报告人：雒建林，中科院物理所
时间：10月9日（周二）14:00
单位：中科院物理研究所
地点：M楼236
报告分两个部分，第一部分主要介绍和低温比热相关的物理基础知识，比热在超导相变和超导能隙对称性中的应用以及差分比热测量方法等。第二部分介绍Cr基超导体的发现，现有的几个Cr基超导体的非常规超导电性研究等。
报告人：Joseph P. Heremans，The Ohio State University
时间：10月9日（周二）15:00
This talk will explain what the SSE is. Thermally-driven spin physics can be further integrated inside bulk ferromagnetic (FM) or antiferromagnetic (AFM) conductors as magnon-drag. Both SSE and magnon drag extend beyond the magnetically ordered phase of FMs and AFMs into the paramagnetic (PM) regime. Under specific circumstances, short-range, short-lived thermally-driven local fluctuations of the magnetization in PMs, paramagnons, can also drag electrons. We show how this new spin physics gives rise to a thermoelectric figure of merit ZT>1 in the PM regime of the AFM semiconductor MnTe at temperatures three times higher its ordering temperature. This is the first example in which a spin-based effect is much more energetic than the equivalent charge-based effect, the diffusion thermopower.
报告人：Jacques Haissinski，CERN
时间：10月9日（周二）15:00
单位：中科院高能物理研究所
地点：化学楼C305
The speaker will start by briefly recalling the first collider schemes proposed towards the end of the fifties and by a short discussion of the option electron-electron versus electron-positron colliders. Then he will describe the circumstances under which Bruno Touschek proposed to build the AdA e+-e- ring at the Frascati National Laboratories (Italy). He will describe the physics goals and the technical challenges underlying this project and give the main parameters of the ring. The initial successes and the difficulties met in Frascati will be presented. He will say why and how AdA was then brought to the Laboratoire de l’Accélérateur Linéaire (LAL) at Orsay. The results of the AdA runs at Orsay will be presented concerning the beam size and its lifetime. The “Touschek effect” which was then discovered and interpreted will be discussed. He will tell how the ring luminosity was determined. An overall review of the accelerator physics learnt with AdA will be given. What happened next in Europe in the collider field will end the lecture.
报告人：Jacques Haissinski，CERN
时间：10月9日（周二）16:00
单位：北京大学科维理天文与天体物理研究中心
地点：KIAA-PKU Auditorium
Comets have inspired awe since pre-historic times, but the modern study of comets only began with Halley's successful prediction of the return of what is now called Halley's comet. Even today there are only a few thousand comets with well-determined orbits.Nevertheless, the analysis of these orbits yields a compelling model for the formation, evolution and present distribution of comets. This model implies that there are two distinct sources of comets: the Oort cloud, containing over 100 billion comets at 5,000 to 50,000 times the Earth-Sun distance; and the Kuiper belt outside Neptune's orbit. I will review our current understanding of the formation of the Oort cloud and Kuiper belt, and what they can tell us about possible undiscovered planets beyond Neptune. If time permits, I'll describe some of the puzzles arising from the recent discovery of an interstellar asteroid/comet, ʻOumuamua.
报告人：李越，中科院固体物理所
时间：10月10日（周三）15:10
单位：北京大学现代光学研究所
地点：物理楼中楼212室
金属周期纳米结构阵列，由于金属纳米单元之间的等离激元耦合，会产生光/电/磁新效应，是下一代光、电器件的重要基础。然而传统方法不易实现高效、低成本金属纳米周期结构阵列的大面积制备。我们基于激光辐照技术，发展了尺寸均一球形金属纳米颗粒的批量制备方法，为自组装方法构筑金属周期微/纳结构阵列提供了理想单元；发展了金属纳米颗粒二聚体（Dimer）、2D、3D金属微/纳结构阵列自组装新方法，发现了2D金属周期纳米阵列的双通道光学特性，提出了光学传感新原理；实现了超强光学响应的可视化传感检测；揭示了3D金属周期微/纳结构的等离激元强耦合效应，实现了可见光波段宽带超强吸收。金属纳米结构阵列的成功自组装，为下一代光/电/热器件提供了重要的材料基础。
报告人：陈凯，暨南大学
时间：10月10日（周三）15:30
单位：中科院物理研究所
地点：M楼255报告厅
Optical Nanoantennas have received intensive attention for their subwavelength light-manipulation capability and significantly enhanced near-field intensity leading to a variety of promising applications including plasmon-enhanced spectroscopy. Among the various nanofabrication techniques, colloidal lithography (also called nanosphere lithography) is a facile method to fabricate large-are periodic structures without any expensive lithography processes. In this talk, I will introduce several large-scale plasmonic nanoantennas fabricated by colloidal lithography and demonstrate their major applications in surface-enhanced infrared absorption spectroscopy (SEIRA) for ultrasensitive molecular detections.
报告人：余海礼，台湾中研院物理所
时间：10月11日（周四）10:30
单位：北京师范大学物理系
地点：物理楼106
I'll start from the basic one test particle motion in general curved spacetime to examine the natural of Lorentz symmetry which had been mis-interpret since Minkowski. I'll also discuss the step towards a consistent quantum gravity program.
报告人：Haojing Yan，University of Missouri
时间：10月11日（周四）14:00
单位：清华大学物理系
地点：蒙民伟科技南楼S727
Being dusty starbursts, (Ultra)Luminous InfraRed Galaxies (or (U)LIRGs) have high star formation rates, and hence should also have high rates of supernovae. For a typical ULIRG, this rate could be ~ 2-4 events/year. While (U)LIRGs are rare objects in the local universe, their number density grows rapidly as a function of redshift. This makes them ideal targets to search for high-redshift supernovae, which in turn could provide a new avenue for studying galaxy evolution at high-redshifts. However, such a high rate of supernovae must be heavily obscured by dust and thus could only be revealed by observations at the restframe infrared and longer wavelengths. JWST, the next generation IR space telescope, will (soon) be able to open up this new window. To maximize the science returns from the precious JWST resources, such supernova search must be conducted with other time-domain studies in mind (in particular the search for “first stars”). The rationale and some details about this new study will be laid out in this talk.
报告人：王向荣，香港科技大学
时间：10月11日（周四）15:00
单位：中科院物理研究所
地点：M楼253会议室
Magnetization reversal of a single domain nano-particle by a spin-Hall/spin-orbit torque is discussed. We proposed to use two mutually perpendicular electric current components in a heavy-metal film to generate a total current whose direction can vary with time. The Euler-Lagrange equation of the optimal current pulse for the fastest magnetization reversal are found. The equation allows us to obtain the theoretical limit of the minimal magnetization reversal current. The theoretical limit of minimal reversal current is far below the value of the minimal magnetization reversal current of fixed current direction. Above the theoretical limit, the magnetization reversal time under the optimal pulse is very short. These results provide a benchmark for evaluating different strategies of spin-Hall/spin-orbit torque induced magnetization reversal.
报告人：IBM T. J. Watson Research Center Yorktown Heights
时间：10月11日（周四）16:00
单位：清华大学物理系
地点：理科楼郑裕彤讲堂
In this talk I review the basic device physics of STT-based nanomagnetic switching, using the characteristics of the two-terminal STT-based tunnel junction as an example. As an example of real-world device and materials complexity, I’ll discuss the dependence of tunnel device STT switching characterstics on junction resistance-area product, and the likely role hot-electron spin-flip scattering plays in these processes. The demand for high area-density circuit for cost-competitiveness, the need for highly reliable switching characteristics for computation, and the nature of finite temperature nanomagnet dynamics combine to generate needs for significantly more spin-current density. For fast, nonvolatile and deterministic manipulation of nanomagnets, and based on present-day device physics understanding, this requires new sources of spin-current to be considered, such as thermal magnonic or spin-orbit-derived spin-currents. I will briefly review recent advances with these new sources of spin currents, and the likely common challenges they will give rise to, in terms of materials and device design and development.
报告人：赵强，中科院高能物理所
时间：10月12日（周五）13:30
单位：中国科学院大学
地点：雁栖湖校区教1-406
13北京同步辐射装置X射线时间分辨方法发展及高能光源进展介绍
报告人：陶冶，中科院高能物理所
时间：10月12日（周五）14:30
硬X射线由于其高穿透性、元素选择性特点，能提供原子分辨的空间结构以及电子结构信息的优势，使得时间分辨X射线分析方法成为物质动态结构研究的强有利手段。报告第一部分将介绍利用激光pump-X光probe方法，发展的飞秒、皮秒X射线衍射/谱学时间分辨方法及其应用。包括基于激光等离子光源，发展的飞秒X射线衍射及其在低维体系中的应用;以及基于北京同步辐射，发展的皮秒X射线衍射和皮秒X射线吸收谱；还介绍利用国内外光源开展的光催化水解制氢的X射线吸收谱研究；报告第二部分介绍位于怀柔、即将动工的高能光源（High Energy Photon Source，HEPS）。HEPS是发射度极低、6GeV能量的新一代同步辐射X射线光源，具有高能、高亮度、高相干性特点。HEPS建设将使得中国的同步辐射光源发展和国外站在同一起跑线上。将介绍HEPS工程及首批建设X射线光束线站。
14The Study of CP Violation in BLMSSM
报告人：赵树民，河北大学
时间：10月12日（周五）15:30
单位：中科院理论物理所
地点：新楼6620报告厅
In the CP-violating supersymmetric extension of the Standard Model (SM) with local gauged baryon and lepton symmetries (BLMSSM), there are new CP-violating sources which can give extra contributions to the electric dipole moments (EDMs) of quarks, leptons, and neutron. Considering the CP-violating phases, we study the contributions from the loop diagrams and present the numerical analyses in details. It is in favour of exploring the source of CP violation and probing the new physics beyond the SM.
报告人：曹则贤，中科院物理所
时间：10月14日（周日）19:00
单位：中国科学院大学
地点：雁栖湖校区教1-002
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