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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 Marcelo Trivi and Hector J. Rabal, "Stereoscopic uses of diffraction gratings," Appl. Opt. 27, 1007-1009 (1988) Export Citation BibTex Endnote (RIS) HT…
The specific heat C p of hexagonal barium titanate has been measured over a wide temperature range from 50 K to 300 K. The C p curve shows a typical second-order-type anomaly at T 0 =222.7 K; the transition enthalpy Δ H , transition entropy Δ S and specific heat jump Δ C p at T 0 are estimated to be 2.2×10 2 J/mol, 1.…
Microwave conductivity and dielectric constant at 6.5 GHz are reported for three tetramethyltetrathiafulvalene salts: (TMTTF${)}_{2}$X, X=SCN, ${\mathrm{ReO}}_{4}$, and ${\mathrm{SbF}}_{6}$. A divergence of the dielectric constant \ensuremath{\epsilon} is observed at the structureless transition temperature for ${\mat…
We propose a density-functional method for calculating elastic moduli of crystalline solids. The method is based on the second-order Ramakrishnan-Yussouff (RY) expansion of the variational grand-canonical potential around a uniform liquid state. The densities of the strained and unstrained crystal are represented as s…
In an earlier paper, we introduced the concepts of phonon-assisted and impurity-assisted hopping processes to explain the c-axis resistivity in graphite intercalation compounds (GIC's). A different theory was proposed by Shimamura. Both theories provide a qualitative explanation for the observed behaviors in low-stage…
Nuclear spin-lattice relaxation by paramagnetic impurities in insulating crystals is expected in conventional theory to be frozen out in the millikelvin temperature region owing to the freezing of the electron-spin orientation into the lowest-energy spin state in the presence of a static field. Experimental relaxation…
The average asymmetry of two-, four-, and five-dimensional linear and ring polymers, with and without excluded volume, is investigated numerically via Brownian dynamics. It is found that the average asymmetry of nonexcluded volume chains is in good agreement with theoretical predictions in all dimensions studied. The…
Liquid-phase epitaxial growth onto a Si(100) substrate is studied using molecular-dynamics simulations. The material is described using two- and three-body interaction potentials which provide a realistic description of crystalline silicon and of the crystal-melt interface. After preparation at solid-melt coexistence,…
The dynamical structure factor of the solution of rod-like polymers is calculated by using a newly proposed kinetic equation. The initial decay rate of the structure factor is obtained as a power series of the scattering vector k. It is found that (i) the coefficient of k2, which gives the cooperative diffusion consta…
(Te 6 4+ )(Se 8 2+ )(AsF 6 − ) 6 (SO 2 ) cristallise dans le systeme triclinique avec le groupe d'espace P1. Affinement de la structure jusqu'a 0,063
We suggest the possibility that staging transitions, similar to those in graphite intercalation compounds, might occur in a strong magnetic field for high-quality modulation-doped multiple-quantum-well systems with sufficiently low carrier density, \ensuremath{\rho}\ifmmode\bar\else\textasciimacron\fi{}, and sufficien…
X-ray photoelectron spectroscopy (XPS) and tight-binding calculations are used to study the electronic structure and the local order in ${\mathrm{Ge}}_{\mathrm{x}}$${\mathrm{Se}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$ glasses (0<x<0.42). The shape of the valence electronic density of states in Ge-Se compounds is…
Molecular-dynamics simulations are employed in studies of liquid-phase epitaxial growth onto a Si(111) surface. The material is described using two- and three-body interaction potentials which provide a realistic description of crystalline silicon and of the crystal-melt interface. From equilibrium solid-melt coexiste…
Electrochromic properties of nickel-oxide films have been investigated. Films were prepared by rf sputtering from a compressed powder NiO target in an atmosphere of an Ar-O2 mixture. The deposition rate of the nickel oxide decreased when the total pressure of the sputtering atmosphere was increased, but was independen…
Angle-resolved inverse photoemission spectroscopy (ARIPES) and angle-resolved secondary-electron emission spectroscopy (ARSEES) have been performed for graphite to establish experimentally the unoccupied-electronic-band structure as well as to study the difference between the two techniques. Remarkable differences hav…
An upper critical field measurement in the recently discovered ambient pressure organic superconductor (BEDT-TTF) 2 Cu(NCS) 2 ( T c =10.4K) is reported. Three- to two-dimensional crossover behaviour is observed in the temperature dependence of the parallel critical field. The anisotropy of the coherence length near T…
A theory of both thermal and quenched diffuse scattering from incommensurate crystals and quasicrystals is developed. We explore, in particular, the effects of strain fluctuations due to phasons which have dropped out of equilibrium at high temperatures, providing a source of quenched, spatially varying disorder. The…
Molecular-dynamics simulations of amorphous silicon are described, using the two- and three-body interaction potentials constructed by Stillinger and Weber. The amorphous-material preparation procedure is described and the structural and dynamical properties of the amorphous phase are simulated and analyzed. The chara…
Three very long runs of constant temperature molecular dynamics (MD) simulations, extending over typically 2×105 time steps, have been carried out for a state just above the glass transition of equimolar soft-sphere mixtures, with 500 atoms interacting through vαβ(r) =ε(σαβ /r)12, where σαβ =(σα +σβ )/2, and α,β (spec…
We study a one-dimensional system which is neither periodic, quasiperiodic, nor random. We find that the structure factor of this system consists of a set of peaks whose heights scale with L, the length of the chain, according to ${L}^{\ensuremath{\alpha}(k)}$. We show that for k(1/2, \ensuremath{\alpha}(k)\ensuremath…