六角铁氧体螺旋磁性的圆极化共振软X射线衍射研究

Magnetoelectric domains and their switching mechanism in a Y-type hexaferrite

By employing resonant X-ray microdiffraction, we image the magnetisation and magnetic polarity domains of the Y-type hexaferrite Ba$_{0.5}$Sr$_{1.5}$Mg$_2$Fe$_{12}$O$_{22}$. We show that the magnetic polarity domain structure can be controlled by both magnetic and electric fields, and that full inversion of these domains can be achieved simply by reversal of an applied magnetic field in the absence of an electric field bias. Furthermore, we demonstrate that the diffraction intensity measured in different X-ray polarisation channels cannot be reproduced by the accepted model for the polar magne…

一种新的螺旋InSeI晶型：晶体结构与偏振拉曼光谱研究

A new helical InSeI polymorph: crystal structure and polarized Raman spectroscopy study

研究报道了一种未报道的InSeI晶型晶体结构，并通过偏振拉曼光谱分析其晶格动力学，揭示螺旋链取向及晶面差异，未发现手性声子。

FLASH2上超短圆偏振软X射线脉冲的首次实验

First experiments with ultrashort, circularly polarized soft X-ray pulses at FLASH2

本文报道了在FLASH2的FL23光束线上利用新安装的APPLE-III后燃波荡器产生超短圆偏振软X射线脉冲，首次对Co、Fe、Ni的L边进行XMCD实验，获得接近100%圆偏振度的显著二色性信号，为3d过渡金属超快自旋动力学研究提供了高效实验平台。

真空升华超分子半导体薄膜中手性激子的圆偏振电致发光

Circularly polarised electroluminescence from chiral excitons in vacuum-sublimed supramolecular semiconductor thin films

本研究报道了一种手性分子半导体TAT，通过真空共升华实现薄膜内手性结晶，制备出外量子效率达16%、电致发光不对称因子超10%的绿色有机发光二极管，展示了在手性光电子领域的应用潜力。

通过线偏振和圆偏振拉曼光谱研究手性碲的晶格动力学：晶体取向与手性

Lattice dynamics in chiral tellurium by linear and circularly polarized Raman spectroscopy: crystal orientation and handedness

本研究利用角度依赖的线偏振和圆偏振拉曼光谱，结合对称性规则，分析了手性碲在三种晶体学取向下的结构动力学，实现了螺旋链排列的确定与晶面区分，并仅在(0 0 1)面观测到依赖晶体手性的声子频移，为各向异性手性材料研究和器件制造中的取向选择提供了重要指导。

Ultrafast helicity control of surface currents in topological insulators with near-unity fidelity

In recent years, a class of solid state materials, called three-dimensional topological insulators, has emerged. In the bulk, a topological insulator behaves like an ordinary insulator with a band gap. At the surface, conducting gapless states exist showing remarkable properties such as helical Dirac dispersion and suppression of backscattering of spin-polarized charge carriers. The characterization and control of the surface states via transport experiments is often hindered by residual bulk contributions yet at cryogenic temperatures. Here, we show that surface currents in Bi2Se3 can be cont…