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Volumn 90, Issue 3, 2001, Pages 1179-1187

Buried oxide and defects in oxygen implanted Si monitored by positron annihilation

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EID: 0035425010     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1380411     Document Type: Article
Times cited : (19)

References (37)
  • 7
    • 0004001938 scopus 로고
    • Leningrad
    • A. F. Makhov, Fiz. Tverd. Tela (Leningrad) 2, 2161 (1960) [Sov. Phys. Solid State 2, 1934 (1960)].
    • (1960) Fiz. Tverd. Tela , vol.2 , pp. 2161
    • Makhov, A.F.1
  • 8
    • 0004811878 scopus 로고
    • A. F. Makhov, Fiz. Tverd. Tela (Leningrad) 2, 2161 (1960) [Sov. Phys. Solid State 2, 1934 (1960)].
    • (1960) Sov. Phys. Solid State , vol.2 , pp. 1934
  • 18
    • 0345886691 scopus 로고    scopus 로고
    • note
    • Minor differences in surface preparation may explain differences in the S parameter near E=0 between the earlier measurements by Fujinami (Refs. 15 and 16) and the present measurements.
  • 27
    • 0347147793 scopus 로고    scopus 로고
    • note
    • The Jones zone in the extended zone scheme for Si is formed by the set of {202} planes. Its volume corresponds to four electrons per atom (cf. Ref. 27).
  • 34
    • 0345886688 scopus 로고    scopus 로고
    • note
    • The measurements were performed in batches over a 1 year period. It turned out that at the beginning of the investigations a sample orientation was used different from that in the later measurements ([110] vs [100]). It is known (Refs. 34 and 35) that Si has a large anisotropy and that projection onto a [110] direction results in a peak at low momenta while the [100] direction shows a plateau. In Doppler-broadening measurements the effects of the orientation are smaller than in ACAR measurements due to the lower resolution. Also, the directions of the resolved momenta in a Doppler broadening measurement are contained in a cone with a significant top angle owing to the small sample-detector distance in a two-detector setup. A small effect of the orientation will nevertheless remain. Nilen et al. (Ref. 36) have demonstrated this for diamond. To maximize the effect they used a sample-detector distance of 0.5 m and found a 1% variation in S. In our setup with a sample-detector distance of 4 cm the effect is much smaller. The expected effect, a sharper distribution for the [110] direction than for the [100] direction, is in agreement with our measurements. The difference in orientation does not affect the high-momentum part of the distributions.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.