Physics

  2010 MAR 9 - (VerticalNews.com) -- "We introduce a new approach for accelerating the calculation of the electronic structure of new materials by utilizing the empirical pseudopotential method combined with data mining tools," scientists in Algeria report.

  "Combining data mining with the empirical pseudopotential method allows us to convert an empirical approach to a predictive approach. Here we consider tetrahedrally bounded III-V Bi semiconductors, and through the prediction of form factors based on basic elemental properties we can model the band structure and charge density for these semi-conductors, for which limited results exist," wrote H. Zenasni and colleagues ...read more

  2010 MAR 9 - (VerticalNews.com) -- According to recent research from Harbin, People's Republic of China, "The electronic transport through parallel-coupled double quantum dots with Rashba spin-orbit interaction is studied theoretically in the framework of the equation of motion of Green's function. Based on molecular state representation, the Fano interference in the conductance spectrum is readily explained."

  "The possibility of manipulation of the Fano line shape of each spin component is explored by adjusting the Rashba spin-orbit interaction strength. It is also shown that the conductance of each spin component versus phi® exhibits a periodic function with the period of 4 pi," wrote H.T. Yin and colleagues, Harbin Normal University ...read more

  2010 MAR 9 - (VerticalNews.com) -- "The luminescence and excitation spectra in the paramagnetic holmium-yttrium gallium garnet Ho0.2Y2.8Ga5O12 (Ho3+:YGG) have been studied experimentally at temperatures T=80 and 293 K. Identification of the radiative 4f -> 4f transitions observed between S-5(2), F-5(4), and I-5(8) multiplets of the ground 4f((10))-configuration of Ho3+ in sites of D-2 symmetry was performed on the base of the results of numerical crystal-field calculations," researchers in Tashkent, Uzbekistan report ...read more