POSITRON LIFETIME STUDIES OF DEFECTS IN MBE-GROWN SILICON

被引:9
作者
BRITTON, DT
WILLUTZKI, P
JACKMAN, TE
MASCHER, P
机构
[1] NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
[2] MCMASTER UNIV,DEPT ENGN SCI,HAMILTON L8S 4M1,ONTARIO,CANADA
关键词
D O I
10.1088/0953-8984/4/44/012
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A timed positron beam has been used to study defects in MBE-grown silicon layers previously studied by conventional slow-positron techniques and electron microscopy. An expected void-related positron lifetime component has been observed, but at a much lower intensity than expected from the Doppler-broadening results. The implication is therefore that the momentum of the annihilation positron-electron pair at the void is considerably lower than previously assumed. In the lifetime spectra, there is evidence of a trapped positron state in the overlayers with a lifetime similar to that of a positron freely diffusing in silicon. The nature of this defect is, at present, unclear.
引用
收藏
页码:8511 / 8518
页数:8
相关论文
共 39 条
[1]  
BEAN JC, 1988, SILICON MOL BEAN EPI
[2]  
BRANDT W, 1983, POSITRON SOLID STATE, P1
[3]   TIME-DEPENDENT DIFFUSION AND ANNIHILATION OF POSITRONS IMPLANTED IN A SEMI-INFINITE MEDIUM [J].
BRITTON, DT .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (06) :681-692
[4]   POSITRON IMPLANTATION STUDIES OF OXYGEN IN P+-SILICON EPILAYERS [J].
COLEMAN, PG ;
CHILTON, NB ;
BAKER, JA .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (47) :9355-9361
[5]   NEW OXYGEN INFRARED BANDS IN ANNEALED IRRADIATED SILICON [J].
CORBETT, JW ;
MCDONALD, RS ;
WATKINS, GD .
PHYSICAL REVIEW, 1964, 135 (5A) :1381-+
[6]   OXYGEN-INDUCED BROKEN-BOND DEFECT IN SILICON [J].
DALPINO, A ;
NEEDELS, M ;
JOANNOPOULOS, JD .
PHYSICAL REVIEW B, 1992, 45 (07) :3304-3308
[7]  
DANNEFAER S, 1989, J APPL PHYS, V66, P526
[8]  
DANNEFAER S, 1989, PHYS REV B, V40, P11764
[9]  
DANNEFAER S, 1987, PHYS STATUS SOLIDI A, V102, P4814
[10]   LIMITED THICKNESS EPITAXY IN GAAS MOLECULAR-BEAM EPITAXY NEAR 200-DEGREES-C [J].
EAGLESHAM, DJ ;
PFEIFFER, LN ;
WEST, KW ;
DYKAAR, DR .
APPLIED PHYSICS LETTERS, 1991, 58 (01) :65-67