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| 锁定放大技术用于扫描隧道显微镜 | |
| 引用本文： | 曹建章,陈国瑞,陈民新,宋建平,唐天同. 锁定放大技术用于扫描隧道显微镜[J]. 真空科学与技术学报, 2001, 21(1): 79-82 |
| 作者姓名： | 曹建章 陈国瑞 陈民新 宋建平 唐天同 |
| 作者单位： | 1. 西北工业大学电子工程系 2. 西安建筑科技大学机械系, 3. 西安交通大学电子科学与技术系, |
| 基金项目： | 原国家教委、西安交通大学科研基金及西北工业大学博士后基金提供资助 |
| 摘 要： | 介绍了锁定放大技术应用于扫描隧道显微镜(STM)中调制隧道间隙而获得物质表面原子的局域势垒分布的原理，并给出了高定向石墨的观测结果，与恒电流模式下STM图像相比较，具有分辨率高、针尖的影响小、抗干扰性能强的特点。另外，根据局域势垒分布还可区分不同的原子，给解释STM原子图像提供了一种手段。 |
| 关 键 词： | 扫描隧道显微镜 局域势垒 锁定放大器 |
| 文章编号： | 0253-9748(2001)01-0079-04 |
| 修稿时间： | 2000-03-17 |
Application of Lock-inAmplifier to Scanning Tunneling Microscopy |
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| Cao Jianzhang,Chen Minxin ),Song Jianping ),Tang Tiantong ),Chen Guorui. Application of Lock-inAmplifier to Scanning Tunneling Microscopy[J]. JOurnal of Vacuum Science and Technology, 2001, 21(1): 79-82 | |
| Authors: | Cao Jianzhang Chen Minxin ) Song Jianping ) Tang Tiantong ) Chen Guorui |
| Affiliation: | Cao Jianzhang,Chen Minxin 1),Song Jianping 2),Tang Tiantong 2),Chen Guorui |
| Abstract: | The principle of lock in amplification technology,which is implemented to modulate the tunneling gap in the scanning tunneling microscopy (STM),was described in the paper.The local potential barrier distribution of material surface atoms with some conductivity can be obtained by means of such technology in STM.Observed results of the graphite are given.Compared with STM image under constant current condition,the local potential barrier distribution image has higher resolution and less influence on the tip and better anti interference capability.Because the local potential barrier distribution image can distinguish different atoms,so it provides a method to interpret STM image. |
| Keywords: | Scanning tunneling microscopy Local potential barrier Lock in amplifi@ |
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