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I. I. Parfenova
I. I. Parfenova
G.V. Plekhanov Saint Petersburg Mining Institute
G.V. Plekhanov Saint Petersburg Mining Institute

Articles

Applied and fundamental research in physics and mathematics
  • Date submitted
    2009-09-21
  • Date accepted
    2009-11-10
  • Date published
    2010-03-01

Simultaneous doping of silicon carbide with aluminum and nitrogen

Article preview

Three atomic shell cluster of SiC is treated as a set of chemical bonds with tetrahedral coordination. Chemical bonds energies are determined in tight binding approximation taking into account second neighbors interaction and relaxation of atomic positions. Correlations in behavior of Al and N atoms in Si-C-Al-N system determine the quasibinary character (SiC) 1-x (AlN) x alloys. Inhomogeneous regions in (SiC) 1-x (AlN) x system were evaluated using the condition of mixing free energy minimum. We assumed that doping does not change the vibration spectra of the crystal.

How to cite: Parfenova I.I. Simultaneous doping of silicon carbide with aluminum and nitrogen // Journal of Mining Institute. 2010. Vol. 187. p. 109-112.
Fundamental Sciences: applied and interdisciplinary research
  • Date submitted
    2004-10-23
  • Date accepted
    2004-11-06
  • Date published
    2005-05-01

Method for determination of nitrogen solubility in binary III-V systems

Article preview

A model has been developed to calculate the solubility of nitrogen in conventional binary III-V compounds. The model takes into account internal deformations due to relaxation of atoms and the statistical origin of alloys. It is shown that the dispersion of bond lengths in III-V-N solid solutions plays an important role and cannot be neglected. The solubility limit increases by more than three orders of magnitude if both sublattices relax to distances greater than the sixth nearest neighbor position.

How to cite: Parfenova I.I. Method for determination of nitrogen solubility in binary III-V systems // Journal of Mining Institute. 2005. Vol. 163. p. 198-200.
Fundamental Sciences: applied and interdisciplinary research
  • Date submitted
    2004-10-04
  • Date accepted
    2004-11-05
  • Date published
    2005-05-01

Internal strains and structure of energy bands in Ill-N alloys

Article preview

We have investigated the influence of near-order on the electronic properties of III-V-N solutions. In nitride-containing solutions, the clustering of identical atoms as second neighbors leads to an increase in the stress energy and a strong decrease in the width of the forbidden zone. On the other hand, the electronic properties of GaInAs depend very weakly on the near-order. The reason for this is the localization of the wave function of the states of the zone edges around certain atoms.

How to cite: Parfenova I.I. Internal strains and structure of energy bands in Ill-N alloys // Journal of Mining Institute. 2005. Vol. 163. p. 201-203.