Chiral pumping effect induced by rotating electric fields

We propose an experimental setup using 3D Dirac semimetals to access a novel phenomenon induced by the chiral anomaly. We show that the combination of a magnetic field and a circularly polarized laser induces a finite charge density with an accompanying axial current. This is because the circularly polarized laser breaks time-reversal symmetry and the Dirac point splits into two Weyl points, which results in an axial-vector field. We elucidate the appearance of the axial-vector field with the help of the Floquet theory by deriving an effective Hamiltonian for high-frequency electric fields. This anomalous charge density, i.e. the chiral pumping effect, is a phenomenon reminiscent of the chiral magnetic effect with a chiral chemical potential. We explicitly compute the pumped density and the axial-current expectation value. We also take account of coupling to the chiral magnetic effect to calculate a balanced distribution of charge and chirality in a material that behaves as a chiral battery.Comment: 6 pages, 3 figures; a new section added to discuss coupling of the CPE and the CME, a wrong sign corrected, typos fixed, elaborated for better readabilit

Investigation of simulated annealing method and its application to optimal design of die mold for orientation of magnetic powder

Factors affecting the convergence characteristics and results obtained by the optimal design method using the finite element method and simulated annealing are investigated systematically, and the optimal parameters for simulated annealing method are obtained. The optimal shape of the die mold for orientation of the magnetic powder (nonlinear magnetostatic problem) is obtained using finite elements and simulated annealing. The experimental verification is also carried out </p

Growth of transparent conductive Al-doped ZnO thin films and device applications

High-purity transparent conductive Al-doped ZnO (AZO) films were grown by KrF excimer pulsed laser deposition. We used ultraviolet and X-ray photoelectron spectroscopes to directly measure the absolute values of the vacuum work function of AZO films. The structure and electrical and optical properties of the as-grown AZO films were studied using X-ray diffraction, room temperature Hall effect measurement and spectro photometer, respectively. Finally, organic light emitting diodes (OLED) were fabricated on these AZO films. OLED device measurement showed that the current of the OLED with AZO was clearly increased. Our AZO thin films showed a higher conductivity (&amp; ¼ 1:33 Â 10 À4 cm, R s ¼ 10:1 /sq) than conventional indium tin oxide films

ZASTOSOWANIE WYŁADOWANIA ELEKTRYCZNEGO DO OZONOWANIA GLEBY

In this study, influence of ozone treatment on physical properties of soil was investigated. We used a quartz container for ozone treatment of soil. The amount of soil used for treatment was 100 g. Treating time was 90 minutes. Flow rate of ozone gas was 1.5 L/min. We measured characteristics of soil such as inorganic nutrient (NO3-N, NO2-N, and NH4-N), pH(H2O), fungi, DNA of soil, and exchangeable bases (Ca, K, Fe, and Al) before and after ozone treatment.W niniejszym opracowaniu, opisano badania wpływu obróbki ozonem na własności fizyczne gleby. Do ozonowania gleby wykorzystaliśmy pojemnik kwarcowy. Ilość gleby poddanej działaniu ozonu wynosiła 100g, a czas oddziaływania 90 minut. Przepływ ozonu wyniósł 1.5l/min. Mierzono właściwości gleby, takie jak nieorganiczne składniki odżywcze (NO3-N, NO2-N i NH4-N), pH(H2O), grzyby, DNA w glebie i zasady wymienne (Ca, K, Fe i&nbsp;Al) przed i po poddaniu jej działaniu ozonu

ZASTOSOWANIE WYŁADOWANIA ELEKTRYCZNEGO DO OZONOWANIA GLEBY

In this study, influence of ozone treatment on physical properties of soil was investigated. We used a quartz container for ozone treatment of soil. The amount of soil used for treatment was 100 g. Treating time was 90 minutes. Flow rate of ozone gas was 1.5 L/min. We measured characteristics of soil such as inorganic nutrient (NO3-N, NO2-N, and NH4-N), pH(H2O), fungi, DNA of soil, and exchangeable bases (Ca, K, Fe, and Al) before and after ozone treatment.W niniejszym opracowaniu, opisano badania wpływu obróbki ozonem na własności fizyczne gleby. Do ozonowania gleby wykorzystaliśmy pojemnik kwarcowy. Ilość gleby poddanej działaniu ozonu wynosiła 100g, a czas oddziaływania 90 minut. Przepływ ozonu wyniósł 1.5l/min. Mierzono właściwości gleby, takie jak nieorganiczne składniki odżywcze (NO3-N, NO2-N i NH4-N), pH(H2O), grzyby, DNA w glebie i zasady wymienne (Ca, K, Fe i&nbsp;Al) przed i po poddaniu jej działaniu ozonu

Separated pulsed laser deposition for nanostructured thin films

Abstract We have developed an alternative laser deposition technique for preparation of droplet-free thin films and fine particles. This separated pulsed laser deposition (SPLD) consists of an ablation chamber and a deposition chamber which are independently evacuated under different ambient gases. High quality ZnO films exhibiting both particle-free and uniform deposition were obtained such as at an ablation pressure of 5 mTorr (Ar) and a deposition pressure of 10 mTorr (O 2 ). It is shown that, when the bias voltage and magnetic field are simultaneously applied in the deposition chamber, the E × B drift motion of about 70 km/s over the substrates contributes to deposit the smooth and high quality films. XRD and optical transmittance for the deposited films were investigated to clarify the operating properties of the SPLD assisted by the electric field and magnetic field. This SPLD is a promising technique for preparation of films and nanostructured particles

Synthesis of p-type ZnO thin films using co-doping techniques based on KrF excimer laser deposition

Abstract Preparation of N-doped ZnO thin films was attempted using various co-doping methods. A ZnO:Ga (Ga O of 5 wt.%) target 2 3 was ablated in NO gas by pulsed laser deposition (PLD). In addition, a nitrogen ion gun and an ECR nitrogen plasma source were used as post-N-doping treatment of undoped ZnO films. Optical emission from elemental Zn I, Ga I and O I, as well as from N molecules, was identified in the plasma plume. The structural, optical and electrical properties of these synthesized films 2 were investigated. All films show n-type conduction, with resistivity in the range 10 -10 V cm and carrier density from y3 y2 10 to 10 cm

NO Sensing Property of Carbon Nanotube Based Thin Film Gas Sensors Prepared by Chemical Vapor Deposition Techniques

To prepare a gas sensor that can operate at room temperature, carbon nanotubes (CNTs) were grown on Al 2 O 3 substrates with interdigital Pt electrodes (Al 2 O 3 substrate) by both pulsed laser deposition (PLD) and chemical vapor deposition (CVD). In this combined method, Fe catalytic thin film was prepared by PLD and then CNTs were grown on the Fe thin film by thermal CVD using an ethylene gas. The surface images of the prepared CNTs on the substrates were observed by scanning electron microscopy (SEM), and the sensitivity to NO gas was measured. The resistance of the prepared CNT-based gas sensor was found to decrease with increasing sensor temperature, and it decreased with increasing NO gas concentration at room temperature. In this paper, it is suggested that CNT gas sensors have a great possibility to be applied as innovative NO gas sensors on the basis of the experimental results