Long-range interactions mediated by screening in a 2D electron gaz:
Tracing Co monomer diffusion on Cu(111) with STM.
![](https://www.epfl.ch/labs/lns/wp-content/uploads/2018/08/Co_Cu_300.gif)
![](https://www.epfl.ch/labs/lns/wp-content/uploads/2018/08/Co_Cu_300_size.gif)
Substrate temperature: T = 10.2 K
Time between subsequent frames: t = 44 s
Coverage: θ = 2·10-3 ML
Tunneling parameters:
V t = 30 mV
I t = 0.53 nA