Materials Literature
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In this paper we present detailed theoretical analysis of the frequency and/or magnetic field dependence of the surface impedance of a metal at the anomalous skin effect. We calculate the surface impedance in the presence of a magnetic field directed along the normal to the metal surface. The effects of the Fermi-liqu…
First-principles calculations are applied to study spin Hall effect in semiconductors and simple metals. We found that intrinsic spin Hall conductivity (ISHC) in realistic materials shows rich sign changes, which may be used to distinguish the effect from the extrinsic one. The calculated ISHC in n-doped GaAs can be w…
The Colle and Salvetti approach [Theoret. Chim. Acta, 37, 329 (1975)] to the calculation of the correlation energy of a system is modified in order to explicitly include into the theory the kinetic contribution to the correlation energy. This is achieved by deducing from a many electrons wave function, including the c…
A measurement and analysis technique has been developed to quantify the complex contributions to the nonlinear dielectric and converse piezoelectric response in ferroelectric ceramics. The electric field dependent response was quantified in two important bulk ceramic piezoelectric systems, Pb(Zr1−x,Tix)O3 and (1−x)BiS…
Dielectric relaxation and polar structures of BaTi1−xSnxO3 ceramics, x=0.10–0.20, are investigated by means of dielectric spectroscopy and piezoresponse force microscopy. A transition regime between “normal” ferroelectric and relaxor behaviors is encountered. In the compositions with x=0.10, a complex domain pattern c…
Al-doped zinc oxide (ZnO:Al) films were applied to liquid crystal displays (LCDs) as transparent electrodes substituting indium tin oxide (ITO). While the ZnO:Al-based twisted nematic LCD cell showed similar operational behavior to ITO-based counterpart, its electro-optical (EO) and residual dc (r-dc) characteristics…
A first-principles study on strongly correlated monoclinic cupric oxide CuO has been performed by using the $\mathrm{LSDA}+\mathrm{U}$ method. The optimized structural parameters of the crystal CuO are in good agreement with the experimental data. The electronic structures and magnetic properties calculated from the $…
An extensive set of infinite-wavelength refractive indices recently derived from a single-oscillator Sellmeier equation [J. Phys. Chem. Ref. Data 31, 931 (2002)] was used to obtain mean total polarizabilities for 340 oxides, 3 hydroxides, 46 oxyhydroxides, 10 oxyfluorides, 8 oxychlorides, 80 hydrates, and 51 fluorides…
Geometrical factors suitable for use in Mie–Gans theory are derived from discrete dipole aproximation generated spectra for a number of pseudonanorods permitting the rapid calculation of extinction spectra. It is shown that the rod width, rod end-cap geometry (flat, oblate spheroid, and sphere) and the rod size distri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpider Silk: Ancient Ideas for New BiomaterialsRandolph V. LewisView Author Information Department of Molecular Biology, University of Wyoming, Laramie, Wyoming 82071-3944 Cite this: Chem. Rev. 2006, 106, 9, 3762–3774Publication Date (Web):June 15, 2006Publication History Re…
We study the electronic states of narrow graphene ribbons (``nanoribbons'') with zigzag and armchair edges. The finite width of these systems breaks the spectrum into an infinite set of bands, which we demonstrate can be quantitatively understood using the Dirac equation with appropriate boundary conditions. For the z…
We are developing a short near-infrared (λ=0.9-1.35μm) high-resolution (R<sub>max</sub>=100,000) and high-sensitivity spectrograph "WINERED" by using several unique approaches. We adopt a classical cross-dispersed configuration for the optical system because it provides the best balance between the system th…
The cobalt aluminum silicides Co19Al45Si(10-x) (x = 0.13) and Co5Al14Si2 were synthesized in liquid aluminum and characterized by single-crystal X-ray diffraction. Co19Al45Si(10-x) (x = 0.13) crystallizes in the monoclinic space group C2/c with lattice parameters a = 19.991(2) A, b = 19.143(2) A, c = 12.8137(15) A, be…
A significant amount of many-body problems of quantum or classical equilibrium statistical mechanics are conveniently treated at fixed temperature and system size. In this paper, we present a new functional integral approach for solving canonical ensemble problems over the entire coupling range, relying on the method…
The reaction of the chiral phosphazene copolymer {[NP(O 2 C 20 H 10 Br 2 )] 0.8 [NP(OC 6 H 4 PPh 2 ) 2 ] 0.2 } n ( I ) [(O 2 C 20 H 10 Br 2 ) = R-6,6‘-dibromo-2,2-dioxy-1,1‘-binaphthyl] with t BuLi in THF gave the intermediate {[NP(O 2 C 20 H 10 Li 2 )] 0.8 ][NP(OC 6 H 4 PPh 2 ) 2 ] 0.2 } n ( II ) that was treated wit…
10.1021/ma0604901
Temperature-dependent deuteron spin lattice relaxation times T(1) have been obtained from water in its three amorphous states at ambient pressure: low density amorphous (LDA), high density amorphous (HDA), and very high density amorphous (VHDA). It is found that in all of these states the magnetization recovery is ess…
The longitudinal polarizabilities of carbon nanotubes are determined using first principles density functional theory. These results demonstrate that the polarizability per atom of a nanotube in the axial direction is primarily determined by the band gap. In fact, polarizability per atom versus inverse band gap yields…
The wormlike chain model of stiff polymers is a nonlinear σ-model in one spacetime dimension in which the ends are fluctuating freely. This causes important differences with respect to the presently available theory which exists only for periodic and Dirichlet boundary conditions. We modify this theory appropriately a…
Thermoacidophilic archaea such as Thermoplasma acidophilum and Sulfolobus solfataricus are known to metabolize D-glucose via the nED (non-phosphorylated Entner-Doudoroff) pathway. In the present study, we identified and characterized a glyceraldehyde dehydrogenase involved in the downstream portion of the nED pathway.…