All low voltage lateral junction scanning tunneling microscope with very high precision and stability
All low voltage lateral junction scanning tunneling microscope with very high precision and stability
复制标题
全低压横向结扫描隧道显微镜，具有极高的精度和稳定性
DOI：
10.1063/1.3005484
复制
发表时间：
2008-11-01
影响因子：
1.6
通讯作者：
Lu, Qingyou
中科院分区：
文献类型：
--
作者：
Hou, Yubin;Wang, Jihui;Lu, Qingyou
我们描述了首台横向结且完全低电压的扫描隧道显微镜，它具有极高的精度、稳定性、紧凑性和图像质量（高定向热解石墨的原子分辨率图像）。在其核心部分，针尖和样品分别位于两个平行安装的压电管扫描器中的一个上，这样针尖 - 样品间距沿扫描器的配对方向进行调节。扫描器的大横向偏转即使在低电压下也能提供较大的间距调节范围，从而能够仅使用低电压（小于±15伏）运算放大器来精确实现粗调（惯性滑块）和微调、反馈控制，进而实现整个电子系统的控制。由于扫描器相同且相邻，热漂移极小。
We describe the first lateral junction and fully low voltage scanning tunneling microscope, featuring very high precision, stability, compactness, and image quality (highly oriented pyrolytic graphite atomic resolution images). In its core, the tip and sample each sit on one of two parallel-mounted piezoelectric tube scanners so that the tip-sample gap is regulated along the scanners' pairing direction. The scanner's large lateral deflection provides a large gap regulation range even under low voltages, allowing exclusively using only low voltage (less than +/- 15 V) operational amplifiers to precisely implement the coarse (inertial slider) and fine approach, feedback control, and hence the entire electronics. Because the scanners are identical and adjacent, thermal drifts are minimal.