Long-range interactions mediated by screening in a 2D electron gaz:
Tracing Cu monomer diffusion on Cu(111) with STM.
![](https://www.epfl.ch/labs/lns/wp-content/uploads/2018/08/Cu_Cu_15.6K_300.gif)
![](https://www.epfl.ch/labs/lns/wp-content/uploads/2018/08/Cu_Cu_15.6K_300_size.gif)
Substrate temperature: T = 15.6 K
Time between subsequent frames: t = 2 min
Coverage: θ = 1.4·10-3 ML
Tunneling parameters:
V t = 100 mV
I t = 0.5 nA