金属的自然旋光性

非中心对称金属的旋光性

Optical activity of noncentrosymmetric metals

本文描述了非中心对称金属在正常态和超导态的旋光性现象。所发现的电导率张量包含负责自然旋光性的非对角部分的波矢量中的线性。它的值通过光频率与由于自旋-轨道相互作用引起的带分裂的比率来表示。计算了金属表面反射光的偏振克尔旋转。在附加文件“Erratum”中，我指出了arXiv：1001.2113（PRB v.81，094525（2010））中的符号错误，该错误导致了关于没有空间奇偶性的介质表面的光反射的克尔效应的错误陈述。

Dispersion-free optical activity in non-centrosymmetric metals

According to the Onsager principle a matrix of kinetic coefficients is symmetric in a system not violating time inversion symmetry. The antisymmetry is possible in systems with broken time inversion symmetry f.i. in systems in external magnetic field. An exception to this rule is presented here. It is shown that in a tetragonal metals with point group $C_{4v}$ not violating time inversion the conductivity tensor is antisymmetric. The corresponding optical properties are considered.

Underlying Structure-Activity Correlations of 2D Layered Transition Metal Dichalcogenides-Based Electrocatalysts for Boosted Hydrogen Generation

Hydrogen fuel is an ideal energy source to replace the traditional fossil fuels because of its high energy density and renewability. Electrochemical water splitting is also regarded as a sustainable, cleaning and eco-friendly method for hydrogen evolution reaction (HER), but a cheaper, earth-abundant and similarly efficient alternative to Pt as an HER catalyst cannot still be discovered. Recently, 2D Transition Metal Dichalcogenides (TMDs) are demonstrated to greatly enhance the HER activity. Herein, our work provides an insight into the recent advances in 2D TMDs-based HER following the compo…

Dynamic chiral magnetic effect and anisotropic natural optical activity of tilted Weyl semimetals

We study the dynamic chiral magnetic conductivity (DCMC) and natural optical activity in an inversion-broken tilted Weyl semimetal (WSM). Starting from the Kubo formula, we derive the analytical expressions for the DCMC for two different directions of the incident electromagnetic wave. We show that the angle of rotation of the plane of polarization of the transmitted wave exhibits remarkable anisotropic behavior and is larger along the tilt direction. This striking anisotropy of DCMC which results in anisotropic optical activity and rotary power, can be experimentally observed as a topological…

DFT研究贵金属杂质在TiO_2（110）上的吸附

DFT study of noble metal impurities on TiO_2(110)

采用密度泛函理论和投影缀加波方法，研究了Au或Pt元素杂质在TiO_2（110）表面上的原子和电子结构.利用表面自由能讨论了这些相的相对热力学稳定性。我们的研究结果表明，Pt原子掺杂的金红石（110）表面可以实现可调的光催化活性在低覆盖率。