THEORY OF ADSORPTION AND SURFACTANT EFFECT OF SB ON AG(111)

被引:121
作者
OPPO, S [1 ]
FIORENTINI, V [1 ]
SCHEFFLER, M [1 ]
机构
[1] UNIV CAGLIARI,DIPARTIMENTO SCI FIS,I-09124 CAGLIARI,ITALY
关键词
D O I
10.1103/PhysRevLett.71.2437
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present first-principles studies of the adsorption of Sb and Ag on clean and Sb-covered Ag(111). For Sb, the substitutional adsorption site is found to be greatly favored with respect to on-surface fcc sites and to subsurface sites, so that a segregating surface alloy layer is formed. Adsorbed silver adatoms are more strongly bound on clean Ag(111) than on Sb-covered Ag. We propose that the experimentally reported surfactant effect of Sb is due to Sb adsorbates reducing the Ag adatom mobility. This gives rise to a high density of Ag islands which coalesce into regular layers.
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页码:2437 / 2440
页数:4
相关论文
共 22 条
[1]   THE HOMOEPITAXIAL GROWTH OF PT ON PT(111) STUDIED WITH STM [J].
BOTT, M ;
MICHELY, T ;
COMSA, G .
SURFACE SCIENCE, 1992, 272 (1-3) :161-166
[2]   GROUND-STATE OF THE ELECTRON-GAS BY A STOCHASTIC METHOD [J].
CEPERLEY, DM ;
ALDER, BJ .
PHYSICAL REVIEW LETTERS, 1980, 45 (07) :566-569
[3]   PERPENDICULAR MAGNETIC-ANISOTROPY OF CO-AU MULTILAYERS INDUCED BY INTERFACE SHARPENING [J].
DENBROEDER, FJA ;
KUIPER, D ;
VANDEMOSSELAER, AP ;
HOVING, W .
PHYSICAL REVIEW LETTERS, 1988, 60 (26) :2769-2772
[4]  
DREIZLER RM, 1990, DENSITY FUNCTIONAL M
[5]   GROWTH-MORPHOLOGY AND THE EQUILIBRIUM SHAPE - THE ROLE OF SURFACTANTS IN GE/SI ISLAND FORMATION [J].
EAGLESHAM, DJ ;
UNTERWALD, FC ;
JACOBSON, DC .
PHYSICAL REVIEW LETTERS, 1993, 70 (07) :966-969
[6]   REFLECTION HIGH-ENERGY ELECTRON-DIFFRACTION (RHEED) OSCILLATIONS AT 77-K [J].
EGELHOFF, WF ;
JACOB, I .
PHYSICAL REVIEW LETTERS, 1989, 62 (08) :921-924
[7]  
GRANDJEAN N, 1993, PHYS REV LETT, V70, P1031, DOI 10.1103/PhysRevLett.70.1031
[8]  
HENNIG D, 1992, PHYS REV B, V46, P4816
[9]  
HONDROS M, 1969, SOC CHEM IND MONOGR, V28, P39
[10]   SURFACE SEGREGATION OF ANTIMONY IN FE-SI STEEL FOR GRAIN-ORIENTED SHEETS [J].
JENKO, M ;
VODOPIVEC, F ;
PRACEK, B .
APPLIED SURFACE SCIENCE, 1993, 70-1 :118-122