			Home About us Contact

Lattice Systems (lattice + system)

Distribution by Scientific Domains

Physics and Astronomy	50%

Selected Abstracts

High-Pressure Synthesis and Structure of SrCo6O11: Pillared Kagome Lattice System with a 1/3 Magnetization Plateau.

CHEMINFORM, Issue 35 2005
Shintaro Ishiwata
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Laser-induced crystal growth of nonlinear optical Ba3Ti3O6(BO3)2 on glass surface

CRYSTAL RESEARCH AND TECHNOLOGY, Issue 12 2008
T. Oikawa
Abstract Nonlinear optical Ba3Ti3O6(BO3)2 crystals were patterned on the surface of CuO (1 mol%)-doped 40BaO-40TiO2 -20B2O3 glass by irradiations of continuous-wave Nd:YAG (wavelength: ,=1064 nm) and Yb:YVO4 (,=1080 nm) lasers. Laser energies absorbed by Cu2+ ions were transferred to the lattice system through a nonradiative relaxation process, consequently heating the glass and inducing local crystallizations. For the lines patterned by Yb:YVO4 laser irradiations with a power of 1 W and a scanning speed of 20 ,m/s, a c -axis orientation of Ba3Ti3O6(BO3)2 crystals along the laser scanning direction is proposed from measurements of X-ray diffraction analyses, polarized optical photographs, polarized micro-Raman scattering spectra, and azimuthal dependence of second harmonic generations. The laser-induced crystallization technique is found to be applied successfully for the spatially selective patterning of nonlinear optical Ba3Ti3O6(BO3)2 crystals in glass. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

On the CTMA for the infinite U Anderson impurity model

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 7 2007
Hellmut Keiter
Abstract If one wants to deal with strongly correlated electron lattice systems within dynamical mean field theory, one needs an impurity solver, i.e. a solution for the dynamics of the Anderson magnetic impurity problem. The most ambitious approach to that problem has been the consistent t-matrix approximation (CTMA). The basic integral equations could be solved with a slow variable approximation, which compared well with a direct numerical solution. Fermi-liquid behavior was not obtained, presumably the normalscattering potential was treated approximately only. We show, how the normal scattering potential can be included exactly. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Exploring Dependence with Data on Spatial Lattices

BIOMETRICS, Issue 3 2009
Mark S. Kaiser
Summary The application of Markov random field models to problems involving spatial data on lattice systems requires decisions regarding a number of important aspects of model structure. Existing exploratory techniques appropriate for spatial data do not provide direct guidance to an investigator about these decisions. We introduce an exploratory quantity that is directly tied to the structure of Markov random field models based on one-parameter exponential family conditional distributions. This exploratory diagnostic is shown to be a meaningful statistic that can inform decisions involved in modeling spatial structure with statistical dependence terms. In this article, we develop the diagnostic, illustrate its use in guiding modeling decisions with simulated examples, and reexamine a previously published application. [source]