Materials Literature
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The satellite structure in both core-level and valence-band photoemission spectra from single-crystal MnO(100) has been studied by using both x-ray photoemission spectra and resonant photoemission. Only very weak satellites are present in the Mn 2p core-level spectra, while no satellite structure is evident in the Mn…
Two-photon-absorption (TPA) spectra of poly(di-n-hexylsilane) (PDHS) films are obtained from 605 to 410 nm at 295 and 11 K, where the intensity is an order of magnitude higher. A strong TPA band is found above 5 eV and interpreted in terms of interacting \ensuremath{\sigma} electrons in a Pariser-Parr-Pople (PPP) mode…
Elastic differential and total cross sections are presented for electron scattering by zinc and cadmium using the optical model. The cross sections are determined for scattering by free atoms and by atoms bound in a solid. The phase shifts are obtained from solutions to the reduced radial wave equation based on an opt…
The emission from KCl:Sb3+ and KI:Sb3+ excited in the A-absorption band was measured as a function of exciting photon energy and temperature. The A-band excitation produced two emission bands for KCl:Sb3+ and a single band for KI:Sb3+. The definitive assignment of these bands is presented in terms of the adiabatic pot…
We analyze the surface-wave propagation in homogeneous layers of chiral or optically active materials. Two cases of chiral slab are considered: a symmetric chiral slab waveguide and a grounded chiral slab waveguide. The dispersion relation and the electric-field components for surface waves guided in a symmetric chira…
Surface plasmon-polariton modes supported by thin metal films surrounded by dissimilar semi-infinite dielectrics are studied. The dispersion of the modes is evaluated, and their characteristics are investigated when the metal film thickness and the superstrate refractive index are varied. Long-range surface plasmon-po…
Pressure-tuned resonant Raman scattering was used to determine the band-gap shift due to quantum size effects of microcrystalline CdS in glass composites and colloids. The wurtzite- to rocksalt-phase-transition behavior in the microcrystallite CdS systems was also studied and is quite different from that in bulk CdS.…
An interatomic potential based on the second-moment approximation of the tight-binding scheme is developed for zirconium, by fitting its four adjustable parameters to the cohesive energy, atomic volume, and elastic constants of the hcp phase. In this work we attempt to model realistically two different crystallographi…
We have demonstrated the iodine doping of vacuum-deposited pentacene (PEN) film which showed characteristic changes in structure and electrical conductivity. The iodine-doped film exhibited a high electrical conductivity of 110 Ω−1 cm−1, which was 11 orders of magnitude larger than that of as-deposited film, and a hig…
Measurements of the first-order Raman spectrum in natural type-IIa diamond for the temperature range of 293 to 1850 K are presented. Both the Stokes and anti-Stokes components are analyzed for their intensity, Raman shift, and width variation with temperature. Optical pyrometry was used to make the temperature measure…
New developments involving nonlinear optical effects are conditioned by the improvement of pertinent figures of merit involving the characteristics of nonlinear optical materials within the ‘‘transparency’’ regime of their optic windows. This paper discusses, from a global standpoint, the maximum values of nonlinear r…
The temperature dependence of the zone-center optical phonon of diamond has been investigated up to 1900 K using Raman scattering. Our frequencies agree well with the first measurements of the temperature dependence of this mode but are found to fall halfway between those obtained in two later determinations up to 100…
The crystal structures of mitochondrial aconitase with isocitrate and nitroisocitrate bound have been solved and refined to R factors of 0.179 and 0.161, respectively, for all observed data in the range 8.0-2.1 A. Porcine heart enzyme was used for determining the structure with isocitrate bound. The presence of isocit…
We have performed a resonant photoemission study on both stoichiometric and reduced ${\mathrm{TiO}}_{2}$ (110) surfaces using synchrotron radiation. A resonant enhancement of the O 2p valence-band photoemission intensity is observed for both stoichiometric and reduced ${\mathrm{TiO}}_{2}$ surfaces as the photon energy…
The bond-orbital theory of linear and nonlinear electronic response in optically transparent materials, developed earlier for pretransition-metal halides and chalcogenides, is expanded to embrace the transition-metal (TM) oxides. The extension requires an explicit recognition of the influence of cationic empty d orbit…
The nonlinear electric and electromechanical responses of lead zirconate titanate Pb(ZrxTi1−x)O3 ceramics to an external ac electric field have been measured under different driving levels. The onset of measurable nonlinearity is observed to be accompanied by the appearance of hysteresis loops. This lossy nature sugge…
An analysis of x-ray diffraction line shape and Raman-scattering results shows that single-molecular-layer ${\mathrm{MoS}}_{2}$, prepared by exfoliation of lithium-intercalated ${\mathrm{MoS}}_{2}$ powder in water, has a structure in which the Mo atoms are octahedrally coordinated, in contrast to the trigonal prismati…
A new degradation analysis of ZnO-based varistors by AC impedance measurements is presented. From these measurements, which have been achieved on samples as a response to a small signal in the frequency range 10 -3 to 10 5 Hz, at room temperature, the distribution function of the relaxation time constant has been dedu…
The photoinduced phase transition of nematic liquid crystalline (LC) emulsions containing 4-n-butyl-4'-methoxyazobenzene (BMAZ) was studied in a polyvinylalcohol (PVA) film as a supporting medium. Phase transition was reversible and accompanied by a large change in transmittance as well as a change in birefringence. P…
The drift and longitudinal diffusion of SF 5 - and SF 6 - in SF 6 has been studied with a drift-tube mass spectrometer. Values of the reduced mobility and of the density-normalized longitudinal diffusion coefficient of these ions are reported over the combined E/N range 15-460 Td. The present zero-field reduced mobili…