Accession Number:

ADA248758

Title:

Theory of Semiconducting Superlattices and Microstructures

Descriptive Note:

Final rept. 15 Oct 88-14 Oct 91,

Corporate Author:

NOTRE DAME UNIV IN DEPT OF PHYSICS

Personal Author(s):

Report Date:

1992-03-01

Pagination or Media Count:

77.0

Abstract:

This final report of work summarizes the theoretical development of Semiconducting Superlattices and Microstructures. These include The first theory of Hjalmarson-Frenkel core excitons in superlattices, and applied it to strained-layer systems. This theory will be useful in characterizing phenomena in such superlattices, using synchrotron radiation. A unified theory of dopants in II-VI materials, with emphasis on ZnSe and candidates for blue-green lasers. This explains why Ga is no longer an effective dopant in Znl-xMnxSe for 0.1, with a theory that also provides a natural explanation of why ZnTe is almost unique among the II-VI semiconductors in that it is naturally p-type. This work provides, a theoretical framework for viewing and understanding the recent successes at 3M by Haas et al. in obtaining blue emission from ZnSe. It also provides strong evidence against the thirty-year-old explanation that self- compensation is responsible for the inability to make a p-n junction in II-VI semiconductors. A general theory of substitutional impurities in superlattices that predicts anomalous changes of dopant character with layer thicknesses, and establishes an intellectual framework for understanding the properties of impurities in superlattices. Superlattices, Bjalmarson-Frenkel Theory, Deep level theory, Mobius transforms, Amorphus silicon, ZnSe, Gap, Theory of dopants, Ti Tc Superconductors.

Subject Categories:

  • Electrical and Electronic Equipment
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE