Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Dielectric constant (K), loss (tan δ), and conductivity (σ) of single crystals of PbI2 are measured (E ∥ c-axis) as a function of frequency in the range 102 to 107 Hz and at temperatures between 77 to 560 K. At room temperature (≈︁ 303 K), the K-value at 106 Hz is 6.7. The dielectric constant of this crystals increase…
The domain structure of the ferroelastic monoclinic phase of BiVO4 is examined by electron microscopy and electron diffraction methods. It consists of two orientation variants separated by two sets of quasi-mutually “perpendicular” walls. The orientation of the domain walls is not determined by symmetry but follows fr…
Cadmium–tin-oxide films with high conductivity and high visible transmission were prepared by dc reactive sputtering from a Cd-Sn alloy target in an Ar-O2 atmosphere. The electrical and optical properties of these films were found to depend strongly uponthe oxygen concentration in an Ar-O2 atmosphere during deposition…
The rotational motion of the ammonium ion in polycrystalline NH4Br has been investigated by quasielastic incoherent neutron scattering at 12 different temperatures between 297 and 409 K. The measured spectra were corrected for multiple scattering and compared to the C4-rotational jump model. The elastic incoherent str…
0.13 0.3224 (3) 0.2508 (3) 0.2405 (3) 0.38 0.1496(3) 0.1682(3) 0.1030(3) 0.13 0.0253 (3) 0.3488 (3) 0.0324 (3) 0.18 -0.1820 (3) 0.3628 (3) 0.1089 (3) 0.10 -0.3535 (3) 0.4659 (3) -0.0016 (3) 0.29 0.3694 (9) 0.1500 (8) 0.2690 (8) 0.93 0.5598 (8) -0.0968 (8) 0.1330 (7) 0.55 0.4747 (8) 0.1018 (8) 0.0745 (8) 0.84 0.3469 (8…
Fluorescent and Raman scattering by molecules embedded in dielectric particles is strongly dependent on the morphology and optical properties of the particle, the distribution of active molecules within the particle, and, in the case of nonspherical particles, orientation. The model previously applied to spheres and c…
Molecular dynamics computations are reported for systems of soft repulsive discs of the inverse twelfth-power potential and for Lennard-Jones atoms in two dimensions. In the case of soft discs the melting transition is obtained by assuming a first-order transition and subsequent application of Ross’s melting rule. The…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text D.-S. Wang, H. Chew, and M. Kerker, "Enhanced Raman scattering at the surface (SERS) of a spherical particle," Appl. Opt. 19, 2256-2257 (1980) Export C…
Implementation of the Judd–Ofelt theory of induced electric dipole transitions is considered for rare-earth ions in LaF3. Parameters in the theory are derived a priori. Calculations of the multiplet-to-multiplet line strengths, lifetimes, branching ratios, and line-to-line squared matrix elements are performed between…
The nonlinear Thomas-Fermi equations which describe the screening of intercalant layers in graphite intercalation compounds are solved analytically in the approximation that the graphite $c$-axis band dispersion is neglected. The total energy of the system of charged intercalant layers and the self-consistent charge d…
Highly transparent (over 90% transmission in the visible range) and highly conductive (resistivity ≃2×10−4 Ω cm) indium oxide (undoped) films have been produced by thermal evaporation from an In+In2O3 source in a vacuum chamber containing low pressures of O2. These properties are comparable or superior to the best tin…
The electrical conductivity of a charged layer of graphite is calculated from first principles within a tight-binding framework. The Fermi surface consists of circles around the $P$ points in the Brillouin zone. In the neighborhood of these points we obtain analytical expressions for the electron-phonon coupling ${g}_…
The results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported. Included are measurements on both as-grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]xand [CH(I3)y]x, where y covers the full doping range. The data indicate three important co…
Window-leaved plants are succulent plants which possess areas of clear epidermis on their leaves. The underlying water storage tissue is transparent to allow light penetration to the internal chlorenchyma. The most highly evolved window-leaved plants with the most transparent tissue grow completely underground in dese…
A thermochemical ablation model for tantalum carbide loaded carbon-carbons is developed assuming phase equilibrium at the ablating surface with the simplified form of the surface energy balance employing the transfer coefficient approximation for unity Lewis number. The model also utilizes the fail temperature concept…
Utilising a crossed-electron-beam-metal-atom-beam scattering technique differential excitation cross sections at 10, 20, 40 and 54.4 eV incident energies and at scattering angles ranging from 10 to 120 degrees have been measured for the following transitions: (i) elastic scattering, and (ii) excitation from ground sta…
In surface studies, the mirror electron microscope (MEM) can give a picture of electrical and geometrical roughness and simultaneously a continuous measurement of local work-function changes Delta phi ; however, no critical study has been done on the accuracy of such a measurement. Using the MEM, the authors developed…
A detailed low-energy electron diffraction analysis of a clean Fe(110) surface is described. The experimental data base consists of intensity-versus-energy curves (spectra) at 5 directions of incidence with a total of 34 spectra at energies up to 210 eV. A statistical analysis carried out with the reliability factor (…
Infrared reflectivity measurements are performed with a scanning interferometer on a single crystal over a wide range of temperature (300-1350K) especially in the cubic paraelectric phase of barium titanate (T c =395K). The temperature dependence of TO and LO frequencies, dampings and TO oscillator strengths is report…
It is shown that the mixing of vibration-rotation states by nuclear hyperfine interactions causes crossover resonances to appear in infrared saturation spectra. Examples are displayed in the ${\ensuremath{\nu}}_{3}$ band of S${\mathrm{F}}_{6}$ and obtain the tensor centrifugal-distortion constant ${t}_{044}$ and the t…