1985
DOI: 10.3367/ufnr.0147.198511d.0523
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Defect formation in solids by decay of electronic excitations

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Cited by 41 publications
(6 citation statements)
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“…STE is not found in the high-symmetrical oxides, such as MgO and CaO which have branched structure of the anionic excitons. It is typical for oxides with low local symmetry of oxygen center, 36,37 such as SiO 2 , ␣-Al 2 O 3 , YAlO 3 , Y 3 Al 5 O 12 , and HfO 2 , to have the same property. The change of PL spectra was also attributed to the change of charged states as the main defects in high-k materials are believed to be the oxygen vacancies.…”
Section: Resultsmentioning
confidence: 99%
“…STE is not found in the high-symmetrical oxides, such as MgO and CaO which have branched structure of the anionic excitons. It is typical for oxides with low local symmetry of oxygen center, 36,37 such as SiO 2 , ␣-Al 2 O 3 , YAlO 3 , Y 3 Al 5 O 12 , and HfO 2 , to have the same property. The change of PL spectra was also attributed to the change of charged states as the main defects in high-k materials are believed to be the oxygen vacancies.…”
Section: Resultsmentioning
confidence: 99%
“…In insulators, Frenkel pairs could arise through exciting electron subsystem of a crystal due to non-elastic interaction of incident particles with solid state atoms. That phenomenon is well known for wide-gap ion insulators of which typical examples are alkali-halide crystals [3]. In the present work that effect is not considered as: 1) in every cases, classic threshold generation of radiation defects have been observed with all studied compounds; 2) it is not possible to produce directed displacement of interstitial atoms by means of Frenkel pair generation due to excitation of electron subsystem in solids.…”
Section: Physical Basis Of Selective Removing Atoms Of a Given Sort O...mentioning
confidence: 84%
“…Thus, it is momentum and energy transfer connected with these particles/ electrons that result in the formation of spatially correlated pairs of vacancies and interstitials. [14,17,18] For wide band gap ionic crystals (for example, KCI, KBr), there exists another possibility of point defect generation, namely through electronic excitation using photons (excitonic mechanism). [17,19,20] It was already shown very early [21] that alkali halides (AH) can be colored by X-rays whose energies exceed the band gap.…”
Section: Mechanisms Of Defect Formation In Ionic Halidesmentioning
confidence: 99%