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Point Defects as Precursors of Electron-Hole Centers: Systematics and Theories of Radiation Centers in Minerals

  • Y. Dusausoy
  • J. A. Weil

Abstract

Many of the local (point) defects in solids are paramagnetic or can be made so, and hence are amenable to study by electronic paramagnetic resonance (EPR) as well as by optical spectroscopy. In many cases, it is convenient to classify these into two general types: missing-electron species and excess-electron species, as compared to some diamagnetic precursor. The concept of holes is useful when the number of electrons is insufficient to fill a given atomic or molecular orbital. Typically, when one more electron is required for this completion, i.e., one negative charge is missing (this is theoretically equivalent to the presence of a hypothetical positive charge), then one can speak of the existence of a hole in the orbital, and treat this as a physically meaningful entity. It is fruitful to speak of the paramagnetism and EPR spectrum of such a hole. However, the concept is not universally valuable, e.g., for species H0 and Fe3+ which have half-filled shells.

Keywords

Electron Paramagnetic Resonance Paramagnetic Center Hole Center Hyperfine Structure Alkali Halide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Y. Dusausoy
  • J. A. Weil

There are no affiliations available

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