Abstract
We propose a new method for atomic-scale imaging of spatial current patterns in nanoscopic quantum networks by using scanning tunneling microscopy (STM). By measuring the current flowing from the STM tip into one of the leads attached to the network as a function of tip position, one obtains an atomically resolved spatial image of "current riverbeds" whose spatial structure reflects the coherent flow of electrons out of equilibrium. We show that this method can be successfully applied in a variety of network topologies and is robust against dephasing effects.
Highlights
How does a current flow through a nanoscopic system? The answer to this question is of fundamental interest for our understanding of quantum phenomena at the nanoscale, and of great importance for the further development of nano-electronics and the continued miniaturization of electronic devices
We propose a new method for atomic-scale imaging of spatial current patterns in nanoscopic quantum networks by using scanning tunneling microscopy (STM)
By measuring the current flowing from the STM tip into one of the leads attached to the network as a function of tip position, one obtains an atomically resolved spatial image of “current riverbeds” whose spatial structure reflects the coherent flow of electrons out of equilibrium
Summary
How does a current flow through a nanoscopic system? The answer to this question is of fundamental interest for our understanding of quantum phenomena at the nanoscale, and of great importance for the further development of nano-electronics and the continued miniaturization of electronic devices. We propose a new method for atomic-scale imaging of spatial current patterns in nanoscopic quantum networks by using scanning tunneling microscopy (STM).
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