报告介绍 Abstract: 　　(I) Calibration of Interaction Energy between Bose and Fermi Superfluids. (arXiv: 1409.0282). In this job we study the interaction energy in a mixture of Bose and Fermi superfluids realized in recent cold atom experiment. On the Bose-Einstein-condensate (BEC) side of a Feshbach resonance between fermionic atoms, this interaction energy can be directly related to the scattering length b...

报告介绍 报告摘要： Transition-metal oxides usually have charge-spin-orbital degrees of freedom and display rich properties. In this talk, using a simple spin-orbital level diagram and density functional calculations, we will discuss a spin-orbital state driven metal-insulator transition and magnetic transition in layered cobaltates and nickelates [1]. We will also study the role of spin-orbit coupling in af...

报告介绍 报告摘要：　　量子光力学领域(Quantum Optomechanics)在最近几年取得了令人瞩目的发展，并形成了多个研究方向。我们在2008年提出并开始系统性的研究如何用激光光镊来束缚和冷却微纳粒子到质心运动的量子基态，并制作一个达到量子极限的微小探测器。利用这个系统,我们研究了悬浮在空气中的玻璃球的布朗运动，并首次测量了布朗运动粒子的瞬时速度，完成了这个爱因斯坦在1907年认为是无法完成的任务。在真空中，我们利用反馈冷却，已经...

报告介绍 Abstract:　　It is well-known that water configuration and behaviors are highly affected by the surface. On the other hand, water is generally considered to have negligible effects on the solid surface. But it might not be the case. Here, we theoretically present two examples to show water could significantly affect the surface structure and properties. The water molecule adsorption could induce the...

报告介绍 报告摘要： Pressure is a popular “extreme” condition in the Universe in that most of entity materials such as the planets are at high pressures. High pressure plays significant role in shaping quantum states of emergent phenomena since pressure can modify spin, charge or orbital states of given compound, while pressure in combination with temperature opens up new avenues toward quantum m...

报告介绍 报告摘要： Since its discovery in 2004, the quasi two-dimensional electron gas (q2DEG) at the LaAlO3/SrTiO3 heterointerface has been a paradigm system in studying the emergent phenomena at the oxide interface. Here, I present two unusual ways to tune the q2DEG from LaAlO3 surface, which are intriguing in that surface modification remotely toggles a proximate interface. First, the q2DEG can be locall...

报告介绍 Abstract:　　Transition-state theory (TST) plays a central role in chemistry. It is a classical theory that states that the rate of a direct reaction can be  pproximated by the instantaneous flux through a dividing surface. This leads to the familiar picture of a reaction rate being dominated by a free-energy bottleneck which gives rise to an Arrhenius temperature-dependence. Various attempts h...

报告介绍 报告摘要： Solar cells that can be manufactured by solution based deposition techniques have potential to be low cost photovoltaic technologies. They can be made by continuous coating or printing techniques and possibly on flexible polymer substrates as well. Since the discovery of dye sensitised solar cells over twenty years ago, a number of efficient solar cell systems have been developed with sol...

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报告介绍 报告摘要： Microorganisms in nature have rich variety, whose sizes are from nano to microscale. Therefore, microbes can be used as natural building blocks in nano/micro multilevel fabrication processes. Based on the urgent need of micro/nano biological manufacture of microorganism, four controlling methods: molecular template, magnetic control, microfluidics, and bio-printing for biological manufact...

报告介绍 报告摘要： Here we propose a novel methodology “hand-operating nanotechnology” where molecular orientation, organization and even functions in nanometer-scale can be operated by our macroscopic (hand) operation. This concept can be realized at dynamic two-dimensional medium such as thin films at the air-water interface because this medium possess both features of bulk and molecular dimen...

报告介绍 报告摘要：　　Shape-selective synthesis of noble metal nanocrystals has attracted much attention in recent years owing to their shape-dependent properties and wide variety of applications. Among various approaches to tune the geometry of metal nanocrystals, the introduction of foreign ions in solution-phase syntheses has shown drastic morphology-selection effect. This strategy has been most successf...

报告介绍 报告摘要：　　Metal nanostructures promise to address needs in catalysis, nanomedicine, chemical sensing and more, with the physical and chemical properties of metal nanocrystals determined by a set of structural parameters that include their size, shape, composition, and architecture. Eloquent examples of metal nanostructures prepared by colloidal methods exist. However, fundamental questions about...

报告介绍 Abstract：　　Quasiparticle collapsing is a central issue in the study of strongly correlated electron systems. In the one-dimensional case, the quasiparticle collapsing in a form of spin-charge separation has been well established, but the problem remains elusive in dimensions higher than one. By using density matrix renormalization group (DMRG) algorithm, we show that in an anisotropic two-leg t-J...

报告介绍 Abstract：　　The advent of a new class of 2D Dirac materials, among which graphene is a paradigmatic example, has opened up a new frontier in materials research. Their reduced dimensionality makes these systems especially susceptible to electron-electron interactions and their simple stoichiometry makes them ideal platforms to explore in detail the complex role of many-body effects in configuring o...

报告介绍 报告人简介：　　王牧，1962年12月生。凝聚态物理专业。获南京大学学士（1984）和博士（1991）学位。1992-1994间在荷兰奈梅亨大学固体化学系做博士后研究。1995年起任南京大学教授、博士生导师。现任中国物理学会常务理事；中国结晶学会常务理事；国际晶体生长组织（IOCG）常务理事；国际纯粹与应用物理联合会凝聚态结构与动力学委员会（C5）委员；The European Physical Journal: Applied Physics 编辑，Solid State Communication ...