1D semiconducting atomic chain of In and Bi on Si(001)
1D semiconducting atomic chain of In and Bi on Si(001)
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Si(001) 上 In 和 Bi 的一维半导体原子链
DOI:
10.1088/0953-8984/18/19/l03
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
J. Owen
中科院分区:
文献类型:
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作者:
D. Bowler;C. F. Bird;J. Owen
Deposition of In onto a Bi nanoline template on the Si(001) surface at a very low flux produces long, flat islands with a zigzag appearance. We show that these islands result from the intermixing of the In and the Bi dimer atoms in the nanoline, and comprise an In–Bi atomic chain structure along each half of the nanoline in which the In and Bi atoms can take up favoured hybridizations—sp2 (with empty p orbital) and p3 (with filled s orbital) respectively. There are six different possible isomers of the double-zigzag structure, resulting from different arrangements of the chains on the two sides of the nanolines. Tight-binding and density functional theory (DFT) simulations of the different candidates find that three of these structures have a higher energy than the other three as a result of a repulsive Bi–Bi Coulomb interaction. The two lowest-energy isomers will both match the appearance of the double zigzag in filled-state STM images.
DOI:
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发表时间:
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期刊:
影响因子:
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作者:
通讯作者:
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