报告介绍 Abstract: 　　Based on the recent progress of the long-lived M?ssbauer state 93mNb, a mechanism is proposed to measure the mHz gravitational waves (GWs) by using the electromagnetic (EM) response of a spinful quantum fluid. Recently, F. Sorge suggested a superconductive GW detector. Passing GWs give a beating geometrical phase between two macroscopic wave functions bounded in different anisotropic s...

报告介绍 报告摘要：Spillover in general is defined as the transport of a species, adsorbed or formed on a surface, to another surface In catalysis, only the spillover of catalytically active species is important. Hydrogen atoms are not usually produced on the surface of a support. In hydrogen spillover, H atoms are created on a metal surface and migrate to the surface of the support. The theoretical and expe...

报告介绍 报告摘要： Recent experiments on photosynthetic systems have indicated that coherent delocalization of exciton states significantly contributes to exciton transport, even up to room temperature, raising the possibility that nature has harnessed quantum effects to aid in photosynthesis. However, experimental signals due to excitonic delocalization can be similar to those from vibronic oscillations, w...

报告介绍 报告摘要： The scale of renewable energy challenge not only calls for highly efficient technologies but also abundant, inexpensive, and robust materials. Nanomaterials such as one-dimensional (1D) nanowires can help to mitigate the poor properties of earth-abundant semiconductors to enhance solar energy conversion. I will first discuss a new growth mechanism of nanowires, in which screw dislocation ...

报告介绍 报告摘要：　　In recent years we have witnessed how nanotechnology have developed from being a more research oriented technology towards a more mature technology capable to cope with industrial needs. Especially, this has followed as a consequence of an increased worldwide funding being directed towards nano-enabled applications. Our research efforts in Lund at the Nanometer Structure Consortium, be...

报告介绍 报告摘要： Self-assembled aggregates of dye molecules exhibit intriguing optical properties caused by their collective optical excitations, Frenkel excitons. Examples are exciton superradiance, strong nonlinear optical response, fast excitation energy transport, and efficient light-sensitization. In this talk, I will discuss recent results on tubular molecular aggregates. [1] These systems, consisti...

报告介绍 报告摘要： 　　Orbital is a degree of freedom independent of charge and spin, which is characterized by spatial anisotropy and orbital degeneracy. It plays an important role in magnetism, superconductivity, and transport in transition metal oxides. Recently, the ultra-cold atom optical lattice has provided a new opportunity to investigate novel orbital physics that does not appear in usual solid sta...

报告介绍 Abstract:　　Topological insulators (TIs) are a recently discovered class of materials having insulating bulk electronic states but conducting boundary states distinguished by nontrivial topology. So far, several generations of TIs have been theoretically predicted and experimentally confirmed, all based on inorganic materials. In this talk, I will present our recent study of a family of two-dimensi...

报告介绍 报告摘要：　　Chemically reactive atmospheric species play a crucial role in tropospheric processes that dominate regional air quality and global climate change. Contrary to long-lived species (such as greenhouse gases), real time in situ sensing such short-lived atmospheric molecules represents a real challenge due to their very high reactivity resulting in short lifetimes (of around 1-100 seconds)...

报告介绍 Abstract: 　　Many approaches, computational and experimental, are being pursued to solve the protein folding problem. One particularly exciting area is fast time-resolved spectroscopy, both in the infrared and ultraviolet regions of the electromagnetic spectrum, the latter via time-resolved electronic circular dichroism spectroscopy. These spectroscopic methods offer resolution on a nanosecond (or ...

报告介绍 Abstract：　　Topological insulators are new states of matter with a bulk gap and robust gapless surface states protected by time-reversal symmetry. When time-reversal symmetry is broken, the surface states are gapped, which induces a topological response of the system to electromagnetic field -- the topological magnetoelectric effect. In this talk I present our recent study of the topological surfa...

报告介绍 报告摘要： Two-dimensional topological insulators (2D TIs) have been proposed as platforms for many intriguing applications, ranging from spintronics to topological quantum information processing. Realizing this potential will likely be facilitated by the discovery of new, easily manufactured materials in this class. With this goal in mind, we introduce a new framework for engineering a 2D TI by hyb...

报告介绍 Abstract: 　　Intersubband polaritons are hybrid light- matter excitations resulting from strong coupling of intersubband transition in the Quantum Well and spatially confined cavity mode. Theoretical description of their formation was usually done neglecting many- electoin interactions and spin degree of freedom. We revise these assumption and show that in realistic cases the formation of the polar...

报告介绍 Abstract: 　　The classical Landau-Lifshitz-Gilbert (LLG) equation has been extremely powerful in explaining and predicting magnetization dynamics of magnetic materials at temperatures far below the Curie temperature and thus LLG plays pivotal roles for today's magnetic information technology. With the next generation of magnetic storage possibly involving high temperature operations, it is highly d...

报告介绍 Abstract: 　　The spin degree of freedom of the electron affects not only charge, but also heat and thermoelectric transport, leading to new effects in small structures that are studied in the field of spin caloritronics (from calor, the Latin word for heat).This lecture addresses the basic physics of spin caloritronics. Starting with an introduction into thermoelectrics and Onsager¡¯s re...

报告介绍 报告摘要： SI-traceability is the property of a measurement whereby the measurement's value is tied by an unbroken chain to measurement standards, usually national and international standards coupled to the SI system of units. Comparing measurements of various climate variables such as solar irradiance, sea surface temperature, atmospheric chemistry and constituents, the earth's albedo, etc. require...