Materials Literature
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We investigate the role of electron-lattice interactions in a very narrow half-filled band that would otherwise be described as a Mott insulator. A simple Hamiltonian is presented that incorporates the electron-electron and electron-lattice interactions in the zero-overlap limit. A canonical transformation decouples t…
A model anisotropic system, suggestive of the graphite structure, is investigated: It consists of a series of equally spaced parallel planes. A finite two-dimensional density of electrons in each plane is allowed to move freely in the plane, but tunneling between planes does not take place. The dielectric screening of…
The electron drift mobility in GaAs has been calculated and extensively compared to experimental data. Good agreement is obtained for a wide range of temperature and ionized-impurity concentrations. Calculated results for the electron contribution to thermoelectric power are also presented and compared to the small am…
The crystalline potential of a semiconductor is described in the muffin tin potential approximation as a complex lattice of disjoint potential spheres. These consist of atomic potential spheres in the regular lattice sites and hollow spheres, of potential higher than the muffin tin zero, in an interstitial sublattice.…
We have measured the temperature dependence of the dielectric constants for single-domain SrTi${\mathrm{O}}_{3}$ crystals. Dielectric anisotropies and deviations from the simple Curie-Weiss law have been observed and are discussed in connection with the structural phase transitions at 110 and 65\ifmmode^\circ\else\tex…
The vapour phase oxidation of se to SeO2 which is an intermediate step in the production of high-purity se was studied in a flow reactor as a function of O2/Se mole ratio, and temperature. Sodium dichromate on alumina and activated alumina were used as reactor packings with high-purity and crude selenium. Experiments…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution-crystal equilibrium for pyridine-water systemAlan L. Myers and Alfred J. GlessnerCite this: J. Chem. Eng. Data 1971, 16, 2, 181–184Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Published inissue 1 April 1971https://pubs.acs.org/…
(1971). SHOCK INITIATED OXIDATION OF FORMALDEHYDE. Combustion Science and Technology: Vol. 3, No. 1, pp. 47-49.
Abstract The kinetics of dissolution of five fractions of commercial poly(vinyl chloride) in cyclohexanone was studied at temperatures from 20 to 70°C. Good agreement was observed between the experimental results and equations expressing the dependence of the induction periods and the rates of dissolution on temperatu…
RODNEY GRAHAME, PETER BEIGHTON; THE PHYSICAL PROPERTIES OF SKIN IN CUTIS LAXA, British Journal of Dermatology, Volume 84, Issue 4, 1 April 1971, Pages 326–
"Frictionizing" textile fibers by corona treatment produces larger effects than conventional chemical methods. A marked increase in wool fiber friction occurs, both with and against the scales. For wool, the increase in with-scale fric tion decays slowly with time after treatment; against-scale friction does not. Init…
A description is given of a molecular beam apparatus which extends high resolution absorption spectroscopy into the shorter millimeter wavelength region (up to 500 GHz). A parallel-plate-type absorption cell, allowing for Stark modulation, is used with the molecular beam passing between the plates. The half-width of t…
A perturbed ligand molecular orbital (PLMO) method is presented for the calculation of magnetic ion properties in diamagnetic cubic lattices at a site having trigonal (C3i) symmetry. Expressions for the anisotropic orbital reduction factors k‖ and k⊥ and spin–orbit coupling constants ζ‖ and ζ⊥ are derived in terms of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic studies of permanganate oxidation reactions. III. Reaction with tris(1,10-phenanthroline)iron(II)John R. Sutter and Kenneth W. HicksCite this: J. Phys. Chem. 1971, 75, 8, 1107–1113Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Pub…
Abstract : Selected values of the thermodynamic properties of copper and thirty-one of its binary alloys are presented. Selections have been made by testing experimental data for self-consistency, consistency with known thermodynamic relationships, with the phase diagram, and with other measurements on the same system…
Abstract Low temperature heat capacities from 1.5 to 15 K have been measured for a number of transition metal borides with the compositions Me 2 B, MeB and MeB 2 , and their solid solutions. The measurements show that the borides are characterized by a narrow d-band with a relatively large density of electron states.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of surface reactions of nitric oxide by isotope labeling. II. Deuterium kinetic isotope effect in the ammonia-nitric oxide reaction on a supported platinum catalystKlaus Otto, Mordecai Shelef, and Joseph T. KummerCite this: J. Phys. Chem. 1971, 75, 7, 875–879Publicat…
Abstract A study was made of polyimides based on pyrazinetetracarboxylic dianhydride (PTDA) plus heterocyclic diamines different from the one previously reported by Hirsch. It was postulated that thermal properties might be improved if the diamine portion did not contain the N–N linkage. The results indicate that thes…
Using the atom-beam recoil technique, absolute total cross sections were measured for the scattering of electrons in the energy range 0.3-9 eV by potassium, rubidium, and cesium. The results of these measurements are in substantial disagreement with the experimental values of Brode, obtained more than 40 years ago. On…
Copper single crystals orientated for single glide were deformed in tension at 78°K and irradiated before load-removal with fast neutrons at 4°K or 20°K. The dislocation arrangement which was thus stabilized in the stress-applied state was investigated extensively by transmission electron microscopy and compared with…