In search for the pairing mechanism of the hole doped high temperature superconductors there is still lively debate about the nature of the pseudogap [1] [5]. Some groups report a vanishing pseudogap around optimum doping [2] leading to the idea of a quantum critical point. Other measurements show a smooth convergence of the pseudogap temperature with the superconducting critical temperature in...

The surface exchange and bulk transport of oxygen are highly relevant to ceria-based redox materials, which envisaged for the solar thermochemical splitting carbon dioxide in future. Experimental investigations isotope on CeO2-δ, Ce0.9M3+0.1O1.95-δ (with M3+ = Y, Sm) Ce0.9M4+0.1O2-δ M4+ Zr) samples were carried out first time utilizing oxygen-isotope-enriched C18O2 gas atmospheres as tracer sou...

A InGaP/InGaAs/GaAs dual channel pseudomorphic HEMT (DCPHEMT) with interesting triple doped sheets having gate length 800nm is modeled and simulated by using 2-dimensional simulation package ATLAS from Silvaco. Different DC and microwave performances of the above device are analyzed and investigated to judge the potential of the device for highperformance digital device applications. Due to the...

The zero-temperature magnetoconductivity of just-metallic Si:P scales with magnetic field, H, and dopant concentration, n, lying on a single universal curve: σ(n,H)/σ(n, 0) = G[H−δ∆n] with δ ≈ 2. We note that Si:P, Si:B, and Si:As all have unusually large magnetic field crossover exponents near 2, and suggest that this anomalously weak response to a magnetic field is a common feature of uncompe...

Protonic conductors of BaZr0.5Ce0.3Ln0.2O3-δ (BZCLn532, Ln=Y, Sm, Gd, Dy) were successfully synthesized by using a cost-effective solid state reactive sintering (SSRS) method with 1 wt.% NiO as a sintering aid. The pellets of the BZCLn532 were obtained at sintering temperatures between 1300 1600 °C. The results show that the morphologies and the final relative densities of the obtained BZCLn532...

A Cu-doped zeolite ZSM-5 (Cu-ZSM-5-M) with a micro-meso-macroporous structure was directly synthesized, and it exhibits excellent catalytic activity and good recyclability in the cross-coupling of aryl halides with diphenyl disulfides. This feature should be attributed to the structural characteristics of meso-macropores and homogeneous dispersion of active Cu(δ+) (δ < 2) species in Cu-ZSM-5-M.

Pure electronic Raman spectra with no phonon structures superimposed on the low energy electronic continuum, are reported for the first time, in optimally doped HgBa2CaCu2O6+δ single crystals (Tc = 126 K). Our low temperature spectra (15 K) for the A1g, B1g and B2g symmetries exhibit striking differences with previous data in Bi2Sr2CaCu2O8+δ . The shape of the spectra for the various symmetries...

The production of vanillin from lignin-derived vanillyl alcohol poses a great deal research interest because the availability renewable lignin in abundant quantities. In present study, series copper-doped ceria (CeO2) catalysts were prepared by modified template-assisted method, characterized various techniques, and explored for oxidation to with molecular oxygen as oxidant at normal atmospheri...

The site incorporation mechanism of M dopants into ABO3 perovskites controls the overall defect chemistry and thus their transport properties. For charge balance reasons, incorporation onto the A site would require the creation of negatively charged point defects, such as cation vacancies, whereas incorporation onto the B site is accompanied by the generation of positively charged defects, typi...