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STM study of 3~(1/2) x 3~(1/2)-B reconstruction on Si(111)

机译:在Si(111)上进行3〜(1/2)x 3〜(1/2)-B重建的STM研究

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摘要

The formation of the boron-induced 3~(1/2) x 3~(1/2) reconstruction on Si(111) 7x7 surface has been studied with scanning tunneling microscope. By evaporating elemental B on Si elevated at high temperatures, 3~(1/2) x3~(1/2)-B reconstructed structures develop from the step edge to the adjacent lower terrace. They emerge at temperatures between 800 deg C and 900 deg C. It indicates that phase transition from 7x7 to 1x1 surface structure is necessary for forming the 3~(1/2)-B reconstructed structures. The phase boundary between 7x7 and 3~(1/2)x3~(1/2)-B regions are formed, depending on the direction of the step propagation.
机译:利用扫描隧道显微镜研究了硼诱导的Si(111)7x7表面3〜(1/2)x 3〜(1/2)重构的形成。通过在高温下蒸发掉Si上的元素B,从台阶边缘到相邻的下部平台形成3〜(1/2)x3〜(1/2)-B的重构结构。它们出现在800摄氏度至900摄氏度之间的温度下。这表明从7x7到1x1表面结构的相变对于形成3〜(1/2)-B重建结构是必要的。根据阶跃传播的方向,在7×7和3〜(1/2)×3〜(1/2)-B区域之间形成相位边界。

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