Temperature and doping dependencies of electron mobility in InP semiconductor has been calculated using an iterative technique. The following scattering mechanisms, i.e, impurity, polar optical phonon, acoustic phonon and piezoelectric are included in the calculation. It is found that the electron mobility decreases monotonically as the temperature increases from 100 K to 600 K. The low tempera...

A multi-purpose soft x-ray array diagnostic system was developed for measuring two-dimensional x-ray emissivity profile, electron temperature, Ar impurity transport, and total radiation power. A remotely controlled filter wheel was designed with three different choices of filters. The electron temperature profile can be determined from the ratio of two channels having different thickness of Be ...

Raman spectroscopy was applied to different-impurities-doped 6H-SiC crystals. It had been found that the first-order Raman spectra of N-, Aland B-doped 6H-SiC were shifted to higher frequency when comparing with undoped samples. However, the first-order Raman spectra of V-doped sample was shifted to lower frequency, revealing that there existed low free carrier concentration, which might be ind...

Spin relaxation time of conduction electrons through the Elliot-Yafet, D’yakonov-Perel and Bir-Aronov-Pikus mechanisms is calculated theoretically for bulk GaAs, GaSb, InAs and InSb of both nand p-type. Relative importance of each spin relaxation mechanism is compared and the diagrams showing the dominant mechanism are constructed as a function of temperature and impurity concentrations. Our ap...

In this work, we present a new three-dimensional Monte Carlo (MC) method which naturally recovers the realspace carrier-impurity Coulomb interaction by mesh-based resolution of Poisson’s equation. This method necessitates no additional modifications to the conventional MC simulator, thus simplifying the implementation process. The new method has been validated through the reproduction of the do...

A simple and accurate reverse phase liquid chromatographic method was developed for the determination of related substances, degradants and assay of Tolterodine Tartarate active pharmaceutical ingredient used in the treatment of urinary incontinence. A HPLC method was developed for the separation of related substances, degradants obtained from samples generated after stress degradation and also...

A method for directly measuring the inverse screening length in semiconductors in terms of ionized-impurity concentration and lattice temperature is demonstrated, based on a first-principle calculation of the effect of ionized-impurity scattering. No fitting parameters are involved in the derivation, which covers a wide range of doping concentrations and intrinsically complies with the Mathiess...