Articles you may be interested in Piezoelectric anisotropy of orthorhombic ferroelectric single crystals Diffuse dielectric anomaly in perovskite-type ferroelectric oxides in the temperature range of 400–700°C

It has been experimentally observed that Ti doping of bulk ZrO(2) induces a large red-shift of the optical absorption edge of the material from 5.3 to 4.0 eV [Livraghi et al., J. Phys. Chem. C, 2010, 114, 18553-18558]. In this work, density functional calculations based on the hybrid functional B3LYP show that Ti dopants in the substitutional position to Zr in the tetragonal lattice cause the f...

Conducting polymers have infiltrated our day to day life with a wide range of products extending from the most common consumer goods to highly specialized applications in space, aeronautics and electronics. In this article, current efforts to design novel conducting polymers with the desired conduction properties are reviewed. Some recent results on the electronic structure and conduction prope...

Reactive sputtering was used to grow thin films of ScxGa1-xN with scandium concentrations of 20%70% on quartz substrates at temperatures of 300-675 K. X-ray diffraction (XRD) of the films showed either weak or no structure, suggesting the films are amorphous or microcrystalline. Optical absorption spectra were taken of each sample and the optical band gap was determined. The band gap varied lin...

Because of economic globalization, modern product development has become greatly dependent on effectively leveraging external resources with customers, suppliers, technology providers, and business partners by means of inter-organizational collaborations. Consequently, supply chain management has received considerable attention, with studied that have concentrated on sales forecasting, producti...

A fundamental problem in functional genomics is to determine the structure and dynamics of genetic networks based on expression data. We describe a new strategy for solving this problem and apply it to recently published data on early Drosophila melanogaster development. Our method is orders of magnitude faster than current fitting methods and allows us to fit different types of rules for expre...

We examine band-structure engineering in extremely tetragonal ferroelectric perovskites (ABO3) to make these materials suitable for photovoltaic applications. Using first-principles calculations, we study how B-site ordering, lattice strain, cation identity, and oxygen octahedral cage tilts affect the energies and the compositions of the valence and conduction bands. We find that extreme tetrag...