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<jats:p> <jats:italic>Compared with the metal antenna metasurface, the dielectric metasurface has better optical characteristics and smaller ohmic loss in the optical band, which makes it superior. An elliptical cylindrical nanostructured antenna is designed using GaP with excellent transmission characteristics in the visible band. This structure has a transmission efficiency of up to 0.96 in the visible light band. Based on the Pancharatnam–Berry (PB) phase control principle, the metasurface structure composed of the antennas is studied, and its abnormal refraction metasurface and focusing meta-lens are analyzed. It is a highly efficient sub-wavelength structure, and promises great potential for the applications of circular polarization optics, nanolithography, dense storage and biophotonics.</jats:italic> </jats:p>

<jats:p> <jats:italic>Sintering of polycrystalline diamond with selenium was investigated under pressure of 6.5–10.5 GPa at a constant temperature of 1850 °C. A new carbon-selenium compound with a most plausible chemical formula of SeC and a WC-type hexagonal structure (space group <jats:inline-formula> <jats:tex-math> <?CDATA $P\bar{6}m2$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi>P</mml:mi> <mml:mover accent="true"> <mml:mn>6</mml:mn> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>m</mml:mi> <mml:mn>2</mml:mn> </mml:mrow> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpl_37_5_058101_ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>) has been discovered in the recovered samples sintered at 10.5 GPa and 1850 °C. Refined lattice parameters are as follows: <jats:italic>a</jats:italic> = 2.9277(4) Å, <jats:italic>c</jats:italic> = 2.8620(4) Å, <jats:italic>V</jats:italic> = 21.245(4) Å<jats:sup>3</jats:sup>. The diamond compacts hot-pressed at 10.5 GPa have excellent mechanical properties with a Vickers hardness of about 68 GPa at a loading force of 19.6 N. Diamond intergrowths observed in these samples may have benefited from the catalytic effects of Se/SeC on the nucleation and crystal growth of diamond.</jats:italic> </jats:p>

<jats:p> <jats:italic>One-dimensional (1D) transition metal phosphides (TMPs) with large specific surface areas, high charge transfer efficiency and excellent electrical conductivity have attracted significant attention in hydrogen evolution reaction (HER) as versatile and active catalysts. Herein, the sub-4 nm Mo-Co</jats:italic> <jats:sub>2</jats:sub> <jats:italic>P ultrafine nanorods (NRs) anchored on reduced graphene oxide (rGO) were successfully synthesized by a colloidal mesostructured strategy. Electrochemical test results reveal that the Mo-Co</jats:italic> <jats:sub>2</jats:sub> <jats:italic>P@rGO electrode exhibits superior activity with overpotentials of 204 mV and Tafel slope of 88 mV/dec for HER at 10 mA/cm</jats:italic> <jats:sup>2</jats:sup> <jats:italic>, relative to the Co</jats:italic> <jats:sub>2</jats:sub> <jats:italic>P@rGO electrode in 0.5 M H</jats:italic> <jats:sub>2</jats:sub> <jats:italic>SO</jats:italic> <jats:sub>4</jats:sub> <jats:italic>solution. This improvement could be ascribed to the Mo doping, which results in more active sites, higher electrical conductivity and faster electron-transfer rates. This versatile strategy will provide a promising pathway for transition metal-doped compounds as an efficient catalyst.</jats:italic> </jats:p>

<jats:p> <jats:italic>Perpendicularly magnetized L</jats:italic>1<jats:sub>0</jats:sub> <jats:italic>-MnAl thin films with Co</jats:italic> <jats:sub>2</jats:sub> <jats:italic>MnSi buffer layers were prepared on GaAs (001) substrates by molecular-beam epitaxy (MBE). The samples with high crystalline quality show a maximum uniaxial perpendicular magnetic anisotropy constant of</jats:italic> 1.4 × 10<jats:sup>7</jats:sup> <jats:italic>erg/cm</jats:italic> <jats:sup>3</jats:sup>. <jats:italic>Ultrafast spin dynamics with a magnetization precession frequency up to 200 GHz was investigated by using time-resolved magneto-optical Kerr effect (TRMOKE) measurements, from which the Gilbert damping constant α of epitaxial L</jats:italic>1<jats:sub>0</jats:sub> <jats:italic>-MnAl thin films is evaluated to be less than 0.0175. This work provides an important reference for analyzing the current-induced magnetization switching process in MnAl-based spintronic devices.</jats:italic> </jats:p>

<jats:p> <jats:italic>Coronavirus Disease 2019 (COVID-19), caused by the novel coronavirus, has spread rapidly across China. Consequently, there is an urgent need to sort and develop novel agents for the prevention and treatment of viral infections. A rapid structure-based virtual screening is used for the evaluation of current commercial drugs, with structures of human angiotensin converting enzyme II (ACE2), and viral main protease, spike, envelope, membrane and nucleocapsid proteins. Our results reveal that the reported drugs Arbidol, Chloroquine and Remdesivir may hinder the entry and release of virions through the bindings with ACE2, spike and envelope proteins. Due to the similar binding patterns, NHC (β-d-N4-hydroxycytidine) and Triazavirin are also in prospects for clinical use. Main protease (3CLpro) is likely to be a feasible target of drug design. The screening results to target 3CL-pro reveal that Mitoguazone, Metformin, Biguanide Hydrochloride, Gallic acid, Caffeic acid, Sulfaguanidine and Acetylcysteine seem be possible inhibitors and have potential application in the clinical therapy of COVID-19.</jats:italic> </jats:p>

<jats:p> <jats:italic>We study the solution to the Fokker–Planck equation with piecewise-constant drift, taking the case with two jumps in the drift as an example. The solution in Laplace space can be expressed in closed analytic form, and its inverse can be obtained conveniently using some numerical inversion methods. The results obtained by numerical inversion can be regarded as exact solutions, enabling us to demonstrate the validity of some numerical methods for solving the Fokker–Planck equation. In particular, we use the solved problem as a benchmark example for demonstrating the fifth-order convergence rate of the finite difference scheme proposed previously [Chen Y and Deng X Phys. Rev. E 100 (2019) 053303]</jats:italic>.</jats:p>

<jats:p> <jats:italic>One of the appealing features of topological systems is the presence of robust edge modes. Under a sudden quantum quench, the edge modes survive for a characteristic time that scales with the system size, during which the nontrivial topology continues to manifest in entanglement properties, even though the post-quench Hamiltonian belongs to a trivial phase. We exemplify this in the quench dynamics of a two-dimensional Haldane model with the help of one-particle entanglement spectrum and the probability density of its mid-states. We find that, beyond our knowledge in one-dimensional models, the momentum dependence of the transverse velocity plays a crucial role in the out-of-equilibrium evolution of the entanglement properties</jats:italic>.</jats:p>

<jats:p> <jats:italic>Excitation energy transfer (EET) plays a vital role in many areas of physics and biology processes. Here we address the role of quantum-jump-based feedback control in the efficiency of EET through a chain model. Usually, the decoherence caused by dissipative noise is detrimental to the transfer efficiency. We demonstrate that feedback control can always enhance the efficiency of EET and the dependence of different feedback controls is also discussed in detail. In addition, we investigate the strategy to enhance the efficiency of EET in the Fenna–Matthews–Olson complex as a prototype for larger photosynthetic energy transfer systems</jats:italic>.</jats:p>

<jats:p> <jats:italic>We numerically investigate the effects of ion-to-electron temperature ratio <jats:italic>T</jats:italic> <jats:sub>i</jats:sub>/<jats:italic>T</jats:italic> <jats:sub>e</jats:sub> and temperature gradient ratio <jats:italic>η</jats:italic> <jats:sub>i</jats:sub>/<jats:italic>η</jats:italic> <jats:sub>e</jats:sub> on resistive ballooning modes (RBMs) under tokamak edge plasma conditions. The results show that the growth rates of the RBMs exhibit the characteristic of a quite broad poloidal wavenumber spectrum in the cold ion limit. The growth rate spectrum becomes narrower and the peak of the spectrum shifts from the short to long wavelength side with increasing <jats:italic>T</jats:italic> <jats:sub>i</jats:sub>/<jats:italic>T</jats:italic> <jats:sub>e</jats:sub> and <jats:italic>η</jats:italic> <jats:sub>i</jats:sub>/<jats:italic>η</jats:italic> <jats:sub>e</jats:sub>. The electron temperature gradient has a very weak effect on the stability of RBMs. However, the ion-to-electron temperature ratio and the temperature gradient ratio have strong stabilizing effects on short-wavelength RBMs, while they have relatively weak effects on long-wavelength RBMs.</jats:italic> </jats:p>

<jats:p> <jats:italic>As an important electromagnetic field in experiment, Gaussian beams have non-vanishing longitudinal electric and magnetic components that generate significant energy fluxes on transverse directions. We focus on the transverse energy flux and derive the theoretical propagation properties. Unlike the longitudinal energy flux, the transverse energy flux has many unique physical behaviors, such as the odd symmetry on propagation, slower decay rate on resonant condition. By means of the characteristics of transverse energy flux, it is feasible to find the suitable regions where the information of coherent lights could be extracted exactly. With the typical laser parameters, we simulate the energy fluxes on receiver surface and analyze the corresponding distribution for the coherent light beams. Especially for coherent lights, the transverse energy flux on the <jats:italic>y</jats:italic>–<jats:italic>z</jats:italic> plane with <jats:italic>x</jats:italic> = 0 and <jats:italic>x</jats:italic>–<jats:italic>z</jats:italic> plane with <jats:italic>y</jats:italic> = 0, contains pure coherent information. Meanwhile, in the transverse distance |<jats:italic>y</jats:italic>| &lt; 2<jats:italic>W</jats:italic> <jats:sub>0</jats:sub> (<jats:italic>W</jats:italic> <jats:sub>0</jats:sub> is the waist radius) and |<jats:italic>x</jats:italic>| &lt; <jats:italic>W</jats:italic> <jats:sub>0</jats:sub>/3 the coherent information could also be extracted appropriately.</jats:italic> </jats:p>