FINAL REPORT ON CONTRACT NONR-562(27),
BROWN UNIV PROVIDENCE R I METALS RESEARCH LAB
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A number of experimental and theoretical projects were carried out for example, it was demonstrated that condensation of vacancies constitutes an important mechanism for forming dislocations following crystal growth. The electric charge associated with dislocations in ionic crystals was determined directly for the first time It was shown theoretically that electronic energy bands are associated with dislocations in wide-band-gap compound semiconductors and certain characteristics of these bands were predicted In a study of the drag on moving dislocations in metals it was demonstrated that the interaction due to conduction electrons is temperature independent and is dominant only at very low temperatures. Further investigations of these problems are in progress.
- Solid State Physics