Results 251 to 260 of about 19,172 (292)

Statistical model of ternary group-III nitrides

Physical Review B, 2004
We have derived a statistical model of zinc-blende ternary group-III nitrides, assuming the crystal lattice distortion due to lattice constant mismatch to make the major contribution to the free energy of mixing of these compounds and using a new methodology based on the numerical calculation of the configuration partition functions of the alloys. As a
Sergey Yu. Karpov, Natalya I. Podolskaya, Igor A. Zhmakin, Alexander I. Zhmakin   +3 more
openaire   +1 more source

Complex ordering in ternary wurtzite nitride alloys

Journal of Physics and Chemistry of Solids, 2003
Abstract Atomic ordering in AlGaN films produced by plasma assisted molecular beam epitaxy (PA-MBE) was investigated with X-ray diffraction (XRD) and transmission electron microscopy selected area diffraction (TEM-SAD). Under nitrogen-rich growth conditions, films undergo 1×1 monolayer cation ordering along the [0001] growth direction.
E. Iliopoulos, K.F. Ludwig, T.D. Moustakas   +2 more
openaire   +1 more source

Phonons in ternary group-III nitride alloys

Physical Review B, 2000
The lattice dynamics of random ${A}_{x}{B}_{1\ensuremath{-}x}\mathrm{N}$ alloys $(A,B=\mathrm{A}\mathrm{l},\mathrm{}\mathrm{G}\mathrm{a},\mathrm{}\mathrm{In})$ is studied with a method based on the modified random-element isodisplacement (MREI) and a rigid-ion model.
H. Grille, Ch. Schnittler, F. Bechstedt
openaire   +1 more source

Recent developments in ternary nitride chemistry

1996
Recent developments in the synthesis, structures, and properties of ionic/covalent ternary nitrides are reviewed. A description, including synthetic conditions, is given of preparative methods reported in the literature. Solid state synthetic reactions from binary nitrides as well as novel synthetic approaches such as amide synthesis and ammonolysis of
H.-C. zur Loye, J. D. Houmes, D. S. Bem
openaire   +1 more source

Ordered structures in III-Nitride ternary alloys

Computational Materials Science, 2016
Abstract An efficient evolutionary structure prediction algorithm in combination with ab initio calculations is implemented in order to reveal energetically favorable superstructures of the III-Nitride ternary alloys. Several 2 × 2 × 2 32-atom supercells are used to explore the full range of concentrations, from x = 0 to 1.
Th. Pavloudis, J. Kioseoglou, Th. Karakostas, Ph. Komninou   +3 more
openaire   +1 more source

Synthesis of ternary nitrides by mechanochemical alloying

J. Mater. Chem., 2002
Ternary metal nitrides (of general formula MxM′yNz) attract considerable interest because of their special mechanical, electrical, magnetic, and catalytic properties. Usually they are prepared by ammonolysis of ternary oxides (MxM′yOm) at elevated temperatures.
Claus J. H. Jacobsen, J. J. Zhu, H. Lindeløv, J. Z. Jiang   +3 more
openaire   +1 more source

Optical Properties of III-Nitride Ternary Compounds

physica status solidi (b), 2001
As a basic step in the evaluation of optical properties of the III-nitrides, the dielectric function of AlGaN and InGaN has been computed using the information from the full-band electronic structure in the framework of the random phase approximation.
A. BALDANZI, E. BELLOTTI, GOANO, MICHELE
openaire   +2 more sources

Ternary Nitrides, Phosphides, and Arsenides of Lithium

Angewandte Chemie International Edition in English, 1968
AbstractTernary phases have been prepared from lithium, another metal, and nitrogen, phosphorus, or arsenic. The ternary compounds, in particular the nitrides, are thermally more stable than the binary compounds. The lithium gives rise to a relatively high polar bonding component.
R. Juza, K. Langer, K. Von Benda
openaire   +1 more source

Polaron Properties in Ternary Group-III Nitride Mixed Crystals

AIP Conference Proceedings, 2005
Polaron properties are studied in bulk wurtzite nitride ternary mixed crystals AxB1-xN (A, B = Al, Ga, In) with the use of a dielectric continuum Frohlich-like electron-phonon interaction Hamiltonian. The polaronic self-trapping energy and effective mass are analytically derived by taking the mixing properties of the LO and TO polarizations due to ...
Z. W. Yan, S. L. Ban, X. X. Liang
openaire   +1 more source

Highly Conductive Films of Layered Ternary Transition‐Metal Nitrides

Angewandte Chemie International Edition, 2009
AbstractFilm studies: Epitaxial films of BaZrN2 (see TEM image) and BaHfN2 are grown by polymer‐assisted deposition on SrTiO3 (STO) substrates. The films are phase‐pure, allowing the intrinsic physical properties of the ternary nitrides to be studied. From 5 to 300 K, the films exhibit metallic‐like resistivity–temperature behavior, with large residual
Hongmei, Luo, Haiyan, Wang, Zhengxing, Bi, Guifu, Zou, T Mark, McCleskey, Anthony K, Burrell, Eve, Bauer, Marilyn E, Hawley, Yongqiang, Wang, Quanxi, Jia   +9 more
openaire   +2 more sources