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Titolo:
DEFECT PRODUCTION IN COLLISION CASCADES IN ELEMENTAL SEMICONDUCTORS AND FCC METALS
Autore:
NORDLUND K; GHALY M; AVERBACK RS; CATURLA M; DELARUBIA TD; TARUS J;
Indirizzi:
UNIV ILLINOIS,MAT RES LAB URBANA IL 61801 UNIV HELSINKI,ACCELERATOR LAB FIN-00014 HELSINKI FINLAND LAWRENCE LIVERMORE NATL LAB LIVERMORE CA 94550
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 13, volume: 57, anno: 1998,
pagine: 7556 - 7570
SICI:
0163-1829(1998)57:13<7556:DPICCI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-DYNAMICS SIMULATION; ENERGETIC DISPLACEMENT CASCADES; EMBEDDED-ATOM METHOD; INTERATOMIC POTENTIALS; COMPUTER-SIMULATION; TRANSITION-METALS; ALPHA-IRON; X-RAY; SILICON; SI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
71
Recensione:
Indirizzi per estratti:
Citazione:
K. Nordlund et al., "DEFECT PRODUCTION IN COLLISION CASCADES IN ELEMENTAL SEMICONDUCTORS AND FCC METALS", Physical review. B, Condensed matter, 57(13), 1998, pp. 7556-7570

Abstract

A comparative molecular dynamics simulation study of collision cascades in two elemental semiconductors and five fee metals is performed toelucidate how different material characteristics affect primary defect production during ion irradiation. By using simulations of full 400 eV-10 keV collision cascades and contrasting the results on different materials with each other, we probe the effect of the mass, melting temperature, material strength, and crystal structure on the modification of the material due to the cascade. The results show that the crystal structure has a strong effect on many aspects of damage production, while other material characteristics are of lesser overall importance. In all materials studied, isolated point defects produced by the cascade are predominantly interstitials. In semiconductors, amorphous clusters are produced in the cascade core, whereas in metals most of the crystal regenerates, leaving only small vacancy-rich clusters. Large interstitial clusters found in a few events in the heavy metals were observed to form by the isolation of a high-density liquid zone during the recrystallization phase of a cascade.

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Documento generato il 05/04/20 alle ore 06:47:34