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本文提出了一个由低能电子衍射能带理论计算所确定的Si(111)7×7表面的不等边三角形聚合与添加原子模型。发现:第一层空间距dk=0.95±0.02?(膨胀21.3%±0.02?),第二层空间距dl=0.83±0.02?(膨胀5.9%±0.02?),第三层空间距dl=0.69±0.05?(收缩10.9%±0.08?)和第四层空间距db=2.38±0.08?(膨胀3.8%±0.08?)。In this paper, a scalene triangle-dimer-adatom model of the Si(lll)7×7 surface determined from band theory calculation of Low-Energ electron diffraction is prensented. We found the first-layer spacing distance d1 = 0.95±0.02?(expanded 21.3%±0.02?), the second-layer spacing distance d2=0.83±0.02?(expanded 5.9%±0.02?), the third-layer spacing distance d3 = 0.69±0.05?(contracted 10.9%±0.05?) and the fourth-layer spacing distance d4 = 2.38±0.08? (expanded 3.8%±0.08?).
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中国物理学会期刊
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