Scanning Tunneling Microscopy
Scanning Tunneling Microscopy
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DOI：
10.1007/1-4020-8006-9_3
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Jia;Wei-sheng Yang;Q. Xue
中科院分区：
文献类型：
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作者：
J. Jia;Wei-sheng Yang;Q. Xue
图2。STM尖端的理想模型。假设尖端的尖端是一个半径为R的球体，与样品的距离为d，球体中心的位置为R * 0（参考文献3），由于其极低的对称性，计算尖端波函数非常困难。然而，对于尖端，我们可以采用图2所示的合理模型，即Tersoff et al.[3]用来描述理想尖端的模型，则尖端的波函数为：ψμ= - 1/2 t ct k RekR (k| r³- r³0|)- 1 e - k| r³- r³
Figure 2. An ideal model for STM tip. The cusp of the tip is assumed to be a sphere with radius of R, the distance from the sample is d, the position of the center of the sphere is r⇀ 0 (From Ref. 3). very difficult to calculate the tip wave function due to its very low symmetry. However, for the tip we may adopt the reasonable model shown in Fig. 2, which was used by Tersoff et al.[3] to describe an ideal tip, and then the wave function of the tip is ψμ=− 1/2 t c t k RekR (k| r⇀− r⇀ 0|)− 1 e− k| r⇀− r⇀