1993
DOI: 10.1002/pssb.2221800108
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Enhanced Diffusion of Impurities and Defects in Crystals in Conditions of Ultrasonic and Radiative Excitation of the Crystal Lattice

Abstract: On the basis of the quantum theory of diffusion the influence of crystal lattice excitations (ultrasonic, nuclear irradiation) on the diffusion of impurity atoms is analysed. The effects considered in the paper are determined by two factors: the change of population of the impurity oscillator levels due to interaction with nonequilibrium excitations of the crystal lattice, and the change of the probability of diffusion transitions on the given level. The effects are qualitatively different for heavy impurity a… Show more

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Cited by 22 publications
(6 citation statements)
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“…Ultrasonic irradiation may act upon the quasi-chemical reaction proceeding (B i +V→B s ; V+I→Si s ), as well as upon the point defect diffusion. As the calculations [9] have shown, influence of US on diffusion depends on type of diffusing atom. For light atoms the effects of localization may be observed, while for heavy atoms the effects of diffusion acceleration take place.…”
Section: Discussionmentioning
confidence: 84%
“…Ultrasonic irradiation may act upon the quasi-chemical reaction proceeding (B i +V→B s ; V+I→Si s ), as well as upon the point defect diffusion. As the calculations [9] have shown, influence of US on diffusion depends on type of diffusing atom. For light atoms the effects of localization may be observed, while for heavy atoms the effects of diffusion acceleration take place.…”
Section: Discussionmentioning
confidence: 84%
“…В цих умовах визначальними стають ефекти нелінійної взаємодії гармонічної АХ з вну-трішніми деформаційними полями кристала. Наприклад, генерація ВЧ імпульсів з часто-тою порядку величини оберненого часу про-ходження АХ через неоднорідність (близько частоти фононів) і включення фононних резо-нансних механізмів дії на дифузію через під-вищення заселеності домішкових квантових коливальних рівнів та відповідне зростання вірогідності міграції атома на інші рівні [14].…”
Section: механізм ас "квазікавітації" вакансій-них дефектівunclassified
“…3), the ( )-relaxation duration at the ultrasound switching-off was almost twice as large as at the switching-on. We consider this fact as a kind of additional confirmation that the reconstruction in the point-defect system has a diffusion character, and the diffusion coefficient grows in the ultrasound field [2,34].…”
Section: Acousto-dislocation Mechanism Of Changes Of Electrophysical mentioning
confidence: 99%