Electromigrated Nanogaps are gaps formed in metallic bridges formed by the process of electromigration.
A nanosized contact formed by electromigration acts like a waveguide for electrons. The nanocontact essentially acts like a one-dimensional wire with a conductance of . The current in a wire is the velocity of the electrons multiplied by the charge and number per unit length, or . This gives a conductance of . In nano scale bridges the conductance falls in discrete steps of multiples of the quantum conductance .
- Electromigrated Nanogaps have shown great promise as electrodes in use in molecular scale electronics.
- Researcher have used feedback controlled electromigration to investigate the magnetoresistance of a quantum spin valve.
- Liang et al. (2002). "Kondo resonance in a single-molecule transistory". Nature 417 (6890): 725–9. doi:10.1038/nature00790. PMID 12066180.