Electron band structure and properties of disordered semiconductor compound alloys

D. Alexandrov*, K. S A Butcher, T. L. Tansley

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

A new metric system called the electron metric system, having a basic metric constant, is introduced. The connection between the electron metric system and the external metric system is defined. The symmetry relationships of the multinary semiconductor compound alloys are defined according to the electron metric system. The basic metric constant is found on the basis of a diatomic tetrahedral cell. The electron wave vector in the new system is found and the electron energy states are determined. Correlation is shown between the electron energy and the electron wave vector in the multinary crystal. The LCAO electron band structures of InxAl1xN are presented. The phenomenon tunnel optical absorption is investigated in InxAl1xN, in InxGa1xN, in InN containing oxygen and in non-stoichiometric InN. It is found the optical absorption edges begin in energies much lower than the energy band gaps due to this phenomenon. Existence of excitons of the structure is shown in these semiconductors and it is found that the peaks of the PL spectra correspond to annihilation energies of these excitons.

Original languageEnglish
Title of host publicationComputational Methods and Experimental Measurements XIII
EditorsC.A. Brebbia, G.M. Carlomagno
Place of PublicationSouthampton
PublisherWIT Press
Pages75-84
Number of pages10
Volume46
ISBN (Print)9781845640842
DOIs
Publication statusPublished - 2007
Event13th International Conference on Computational Methods and Experimental Measurements, CMEM 2007 - Prague, Czech Republic
Duration: 2 Jul 20074 Jul 2007

Other

Other13th International Conference on Computational Methods and Experimental Measurements, CMEM 2007
CountryCzech Republic
CityPrague
Period2/07/074/07/07

Keywords

  • Optical properties
  • Semiconductor compound alloys

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