【摘要】 在原子水平上,表面上的原子并不是具有明确边界的硬球.当扫描隧道显微镜的图像对应于表面原子形貌时,实际上是测量表面的态密度.因此要结合原子态而不仅仅从晶体结构出发解释得到的图像.由于噪声、温度漂移等干扰是不可避免的,在室温下获得的样品表面原子级图像经常会有形变.初步解释了漂移的来源,采用估算法对图像进行了修正,通过适当扩大扫描范围降低了温漂的影响.更多还原

【Abstract】 At the atomic scale, the surface atoms are not rigid balls which have definite borders. Therefore scanning tunneling microscope (STM) is used to measure the intensity of electronic states. In order to elaborate the obtained images, the atomic states and the crystal structures should be considered. Since the disturbance of noise and temperature drift is irresistible, the deformation of images obtained under atmosphere and room temperature is always observed. This article aims to explain the possible source of the drift and to recommend the avenue to decrease the effect of the deformation.更多还原