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We report the observation of superstructures associated with the oxygen 2p states in two prototypical manganites using x-ray diffraction at the oxygen K edge. In the stripe order system Bi0.31Ca0.69MnO3, hole-doped O states are orbitally ordered, at the same propagation vector as the Mn orbital ordering, but no oxygen charge stripes are found at this periodicity. In La7/8Sr1/8MnO3, we observe a...

Joseph M. Dahl, Ai H. Mai, Gerald M. Cherf, Nahid N. Jetha, Daniel R. Garalde, Andre Marziali, Mark Akeson, Hongyun Wang , and Kate R. Lieberman From the Department of Biomolecular Engineering, the Department of Applied Mathematics and Statistics, and the Department of Computer Engineering, Baskin School of Engineering, University of California, Santa Cruz, California 95064 and the Department o...

In this report, we describe an experiment designed to determine the mean sign of the scattering angles of the emitted particles for the N + Sm at E/A=35, 100 and 155 MeV. A schematic of the experimental set up is shown in Fig. 1. Two ∆E-E telescopes were positioned at φ=0° and φ=180° around the beam axis and subtended approximately 10° ≤ θ ≤ 35°, where θ and φ are the polar and azimuthal angles...

Laser based lightning control holds a promising way to solve the problem of the long standing disaster of lightning strikes. But it is a challenging project due to insufficient understanding of the interaction between laser plasma channel and high voltage electric filed. In this work, a direct observation of laser guided corona discharge is reported. Laser filament guided streamer and leader ty...

Different types of unusual dynamic behavior have been reported for steady-state microtubules. While almost all earlier reports relied on kinetic measurements of bulk polymerization, we have directly visualized the steady-state addition of subunits to individual microtubules through the use of tubulin derivitized with biotin. Biotinylated tubulin was used both as an internal "seed" for polymeriz...

Direct volume rendering immediately display the datasets into image plane without any intermediate representation. Commonly this method can be classified into image-order techniques represent a backward-mapping scheme and objectorder techniques apply a forward-mapping scheme. By using the image-order methods image is generated pixel-by-pixel casting rays from the view-point through each pixel o...

The unit cell of the high-Tc cuprate YBa2Cu3O61x contains pairs of closely spaced CuO2 layers, the bilayers, separated by CuO chains. Inelastic neutron scattering experiments have demonstrated that electronic states in different CuO2 layers belonging to one bilayer are strongly coupled at all doping levels, whereas the coupling across the chains is much weaker. The nature of this coupling is we...

Ion implantation is widely used to introduce electrically or optically active dopant atoms into semiconductor devices. At high concentrations, the dopants can cluster and ultimately form deactivating precipitates, but deliberate nanocrystal formation offers an approach to self-assembled device fabrication. However, there is very little understanding of the early stages of how these precipitates...

The broad absorption of Cl3 radical was observed between 1150 and 1350 nm using cavity ring-down spectroscopy at 213-265 K and 50-200 Torr with He, N2, Ar, or SF6 diluents. The absorption intensity of Cl3 increased at lower temperature and higher pressure. SF6 was the most efficient diluent gas. The temperature dependent equilibrium constants for Cl3 formation from Cl+Cl2 were theoretically cal...