【作者】 古乾军； 刘宁； 赵文斌； 马自立； 薛增泉； 庞世瑾；

【Author】 Q.J.Gu, N.Liu, W.B.Zhao, Z.L.Ma, Z.Q.Xue, and S.J.Pang( Beijing Laboratory of Vacuum Physics , Chinese Academy of Science, Beijing, 100080)

【机构】 中国科学院北京真空物理实验室；

【摘要】 由于可在室温下从Si(111)7×7表面逐个提取原子,扫描隧道显微镜(STM)已被用于构造几个纳米宽的沟槽。当这种表面改形的取向与Si(111)7×7表面晶格基矢方向平行时,形成的沟槽将具有愿子级平直的边缘,横向宽度仅为一个7×7晶胞。测量了不同偏压下用于制备沟槽的临界电流。还根据实验数据讨论了这种表面改形的机理。更多还原

【Abstract】 The scanning tunneling microscope (STM) has been used to fabricated grooves a few nm wide at room temperature by extracting atoms one by one from the Si (111) 7×7 surfaces. When the direction of modification is parallel to the basic vector of Si (111) 7×7 surfaces, grooves formed by such a process have atomically straight edges and lateral features as small as one 7×7 unit cell wide. The critical current under various bias voltages for fabricating grooves is measured. Based on the experiment data, the modification mechanism is discussed.更多还原