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- Title
Photoplastic Effect in Narrow-Gap Mercury Chalcogenide Crystals.
- Authors
Koman, B. P.; Balitskii, O. O.; Leonov, D. S.
- Abstract
The paper elucidates the peculiarities of photoplasticization effect (PPE) occurring in narrow-gap crystals of mercury chalcogenides illuminated by white light during the process of uniaxial deformation. As found, the irradiation has an influence on the plastic deformation in narrow-gap CdxHg1-xTe crystals. Negative photoplasticization effect (NPPE) described here is concerned with reducing of plastic stress fluidity under white-light irradiation during plastic deformation of crystals at a constant rate. As found, in contrary to wide-bandgap crystals of the II-VI groups exhibiting positive PPE, NPPE observed in CdxHg1-xTe occurs without internal photoeffect. A model explaining the nature of NPPE relies on a decreasing of positive charge in a native oxide layer at the surface of crystal. Charge decreasing reduces potential barrier for exiting on surface of dislocations generated by near-surface sources during dynamical loading. As a result, the level of fluidity stress in the deformed crystal is reduced.
- Subjects
PHOTOPLASTICITY; CHALCOGENIDES; NARROW gap semiconductors; DEFORMATIONS (Mechanics); DISLOCATIONS in metals
- Publication
Metallophysics & Advanced Technologies / Metallofizika i Novejsie Tehnologii, 2018, Vol 40, Issue 4, p529
- ISSN
1024-1809
- Publication type
Article
- DOI
10.15407/mfint.40.04.0529