Atomic Resolution Imaging of Currents in Nanoscopic Quantum Networks via Scanning Tunneling Microscopy

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 variety of network topologies, and is robust against dephasing effects.

5 pages

References in corpus (8)

• Molecular Transport Junctions: Vibrational Effects
• Imaging Magnetic Focusing of Coherent Electron Waves
• Unexpected features of branched flow through high-mobility two-dimensional electron gases
• On the imaging of electron transport in semiconductor quantum structures by scanning-gate microscopy: successes and limitations
• Imaging and controlling electron transport inside a quantum ring
• Imaging Electron Wave Functions Inside Open Quantum Rings
• Imaging Coulomb Islands in a Quantum Hall Interferometer
• Local Current Distribution and "Hot Spots" in the Integer Quantum Hall Regime

Cited by in corpus (4)

• Controlling the Flow of Spin and Charge in Nanoscopic Topological Insulators
• Scanning Tunneling Potentiometry, Charge Transport and Landauer's Resistivity Dipole from the Quantum to the Classical Transport Regime
• Spatial Current Patterns, Dephasing and Current Imaging in Graphene Nanoribbons
• Crossover from quantum to classical transport