报告介绍 Abstract:　　A superconducting state is described by a complex order parameter. In an unconventional superconductor, the order parameter may exhibit a sign change in both momentum and real spaces. Normally, a sign change order parameter, such as the d-wave pairing in cuprates, leads to gapless nodes or nodal lines in the superconducting state which can be detected by many experimental techniques. Ir...

报告介绍 Abstract:　　While charge transport/transfer, both on the molecular and on the bulk level, are presently fairly well understood, their characterization on the mesoscopic scale is still inadequate. These nanoscale charge transport/transfer processes, however, are important to both the frontier of fundamental science and applications to efficient energy conversion and storage devices, such as photovol...

报告介绍 Abstract:　　A facile approach to densely packed freestanding hybrid films for supercapacitor electrodes is developed by self-assembling graphene nanosheets with Ni(OH)2 nanoplates intercalated. In the obtained graphene@Ni(OH)2 hybrid films, the Ni(OH)2 nanoplates act as not only effective space inhibitors to prevent graphene restacking but also pseudocapacitors to improve the overall supercapa...

报告介绍 Abstract:　　Magnetic nanoparticles are promising for biomedical applications, inlcuding magnetic separation, drug delivery, MRI contrast enhancement and magnetic hyperthermia. As stabile colloidal suspension is required, superparamagnetic nanoparticles have been widely investigated, because their zero-remanence and small particle size which enables good suspension. However, superparamgnet...

报告介绍 Abstract: 　　We have successfully developed PEOlated polymeric micelle/silica as multifunctional nanocapsules for targeted bioimaging and controlled delivery. Bioimaging contrast agents, such as fluorescent conjugated polymers, CdSe/CdS/ZnS quantum dots (QDs), and Fe3O4 nanocrystals have been successfully encapsulated into poly(ethylene oxide) (PEO)-based polymeric micelle/silica dual layers via in...

报告介绍 报告摘要：　　Active plasmonic devices are composed of traditional (passive) plasmonic nanostructures hybridized with active materials such as organic molecules and inorganic semiconductors. The functional materials are capable of compensating ohmic losses along with the direct generation of surface plasmon polaritons (SPPs) to achieve ultrafast signal switching, coherent control and modulation, or ...

报告介绍 报告摘要：　　量子级联激光器（quantum cascade laser, QCL）是一种新型的红外激光器，其输出功率比传统的红外光源高2-3个数量级，并且可以通过改变量子阱层的厚度来改变发光波长。在高分辨率分子光谱的测量中，我们组装了基于单模连续可调QCL的超声分子束光谱仪，所研究的分子体系包括结合力比较弱的Ar-H2O二聚体和结合力比较强的 HCCH-NH3/OCS-NH3/环氧丙烷-H2O二聚体。通过分析这些体系的振动-转动跃迁，我们研究了当分子结合时...

报告介绍 报告摘要：　　报告主要介绍武汉国家脉冲强磁场中心装置建设概况以及电源、磁体和科学实验站技术参数。重点介绍电输运科学实验站和磁特性科学实验站测量原理，主要技术指标和具体测量功能。结合磁电阻材料、自旋阻挫、磁子玻色凝聚和合金磁性方面的研究工作，介绍脉冲强磁场这一极端实验条件在研究物质磁相变方面的作用和优势。 报告人简介：　　夏正才，教授，博士生导师，国家重大科技基础设施建设项目—脉冲强磁场实验...

报告介绍 报告摘要：　　极端实验条件可以拓展物质科学的研究空间。脉冲强磁场作为一种极端实验条件在现代凝聚态物质研究中发挥着重要作用，为创造新物态、发现新现象提供了机遇。本报告介绍脉冲强磁场下电输运和磁特性测量的相关实验技术，以及在国际前沿热点研究中的应用。同时还将简单介绍本课题组利用武汉强磁场科学中心电磁科学实验站开展的相关强磁场物理研究。 报告人简介：　　王俊峰，1977年生，副教授，国家脉冲强磁场科学中心...

报告介绍 报告摘要：　　报告主要介绍脉冲强磁场ESR装置概况和主要技术参数、强磁场ESR的特点及其主要研究领域----单分子磁性材料和低维阻挫自旋系统。低维和三角晶格阻挫系统由于强量子涨落导致非经典效应，在低温下不再长程磁有序，而是呈现出自旋液体、激发态与基态之间具有一定的自旋能隙等异常基态，体系量子磁性的起源至今尚未完全理解。利用强磁场磁化和ESR测量可研究这类材料的异常基态、磁化平台和磁场诱导的量子相变。报告通过具体...

报告介绍 报告摘要：　　Pure spin current phenomena are the latest advances from spintronics. A pure spin current without a net charge current delivers maximal spin angular momentum using a minimal carriers, hence generating much less Joule heat in metals and no heat in insulators. A pure spin current cannot be generated by the usual means except through spin Hall effect, spin pumping, and spin Seebeck effect...

报告介绍 报告摘要：　　Recently we developed a coupled-cluster approach (CC) for closed-shell systems with SOC included in post-Hartee-Fock treatment. Total energy, analytical first and second order derivates of this SOC-CC approach at the CCSD and CCSD(T) levels have been developed. Both time-reversal symmetry and spatial symmetry for D2h and its subgroups are exploited[1] in the implementation. In addition...

报告介绍 报告摘要： 　　Broken symmetry is a fundamental concept in physics. The broken symmetries at phase transitions, such as those at the gaseous/solid and the paramagnetic/ferromagnetic transitions, are familiar examples. In cubic B20 magnets, however, it is the inversion symmetry and the 4-fold rotation symmetry that are broken. The broken inversion symmetry leads to the Dzyaloshinskii-Moriya (D-M) int...

报告介绍 报告摘要： When a tunnel barrier is in contact with resistive leads, the electromagnetic excitations in the leads provide a bosonic bath. In Nano-electronic circuits, the quantum fluctuations couple to such a bath and induce quantum dissipation effects. We first study tunneling through a resonant level connected to dissipative baths. We show that several quantum phase transitions (QPT) occur in such...

报告介绍

报告介绍 报告摘要： Graphite oxide sheets, now called graphene oxide (GO), are made by exfoliation of graphite using century-old chemical reactions. Interest in this old material has resurged with the rapid development of graphene since 2004, as GO is considered to be a promising precursor for bulk production of graphene. Apart from making graphene, GO itself also has many intriguing properties. For example,...