Chemical bonding and electronic properties of Se-rich ZnSe-GaAs(001) interfaces

被引:11
作者
Bratina, G
Ozzello, T
Franciosi, A
机构
[1] UNIV TRIESTE,DIPARTIMENTO FIS,I-34014 TRIESTE,ITALY
[2] IST NAZL FIS MAT,LAB NAZL TECNOL AVANZATE SUPERFICI & CATALISI,I-34012 TRIESTE,ITALY
来源
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS | 1996年 / 14卷 / 06期
关键词
D O I
10.1116/1.580182
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We report synchrotron radiation, soft-x-ray photoemission spectroscopy studies of ZnSe-GaAs heterojunctions fabricated by molecular beam epitaxy in situ on GaAs(001)2X4 substrates, Measurements of the band offsets confirm that interfaces grown in Se-rich conditions exhibit relatively low valence band offsets (as low as 0.5 eV), while interfaces grown in Zn-rich conditions show relatively high valence band offsets (as high as 1.3 eV). In the Se-rich case, the improved surface sensitivity of the technique revealed previously unreported contributions to the As 3d and Ga 3d core lineshapes, with substantial (0.8-2 eV) chemical shifts. The shifts, as well as the coverage and escape-depth dependence of the results suggest enhanced atomic intermixing across Se-rich interfaces, with the formation of both Se-As and Se-Ga chemical bonds. (C) 1996 American Vacuum Society.
引用
收藏
页码:3135 / 3143
页数:9
相关论文
共 44 条
[1]  
BALDERESCHI A, 1993, P NATO ADV RES WORKS
[2]  
Barin I., 2008, Thermochemical Data of Pure Substances, VThird
[3]   OPTIMIZATION OF INTERFACE PARAMETERS AND BULK PROPERTIES IN ZNSE-GAAS HETEROSTRUCTURES [J].
BONANNI, A ;
VANZETTI, L ;
SORBA, L ;
FRANCIOSI, A ;
LOMASCOLO, M ;
PRETE, P ;
CINGOLANI, R .
APPLIED PHYSICS LETTERS, 1995, 66 (09) :1092-1094
[4]   LACK OF BAND-OFFSET TRANSITIVITY FOR SEMICONDUCTOR HETEROJUNCTIONS WITH POLAR ORIENTATION - ZNSE-GE(001), GE-GAAS(001), AND ZNSE-GAAS(001) [J].
BRATINA, G ;
VANZETTI, L ;
SORBA, L ;
BIASIOL, G ;
FRANCIOSI, A ;
PERESSI, M ;
BARONI, S .
PHYSICAL REVIEW B, 1994, 50 (16) :11723-11729
[5]   DOPING INTERFACE DIPOLES - TUNABLE HETEROJUNCTION BARRIER HEIGHTS AND BAND-EDGE DISCONTINUITIES BY MOLECULAR-BEAM EPITAXY [J].
CAPASSO, F ;
CHO, AY ;
MOHAMMED, K ;
FOY, PW .
APPLIED PHYSICS LETTERS, 1985, 46 (07) :664-666
[6]  
CAVENETT BC, 1995, MATER SCI FORUM, V182-, P5, DOI 10.4028/www.scientific.net/MSF.182-184.5
[7]  
CHIANG S, 1987, PHYS REV B, V35, P3013
[8]   SURFACE-ATOM X-RAY PHOTOEMISSION FROM CLEAN METALS - CU, AG, AND AU [J].
CITRIN, PH ;
WERTHEIM, GK ;
BAER, Y .
PHYSICAL REVIEW B, 1983, 27 (06) :3160-3175
[9]  
DANDREA RG, 1990, PHYS REV B, V24, P3445
[10]   Atomic scale roughness of GaAs(001)2x4 surfaces [J].
Fan, Y ;
Karpov, I ;
Bratina, G ;
Sorba, L ;
Gladfelter, W ;
Franciosi, A .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1996, 14 (02) :623-631