Feedback controlled electromigration
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controlled electromigration (FCE) is an experimental technique to investigate the phenomenon known as electromigration
. By controlling the voltage applied as the conductance varies it is possible to keep the voltage at a critical level for electromigration
.
. The migration occurs due to the electronic wind force
experienced by the metallic adatom. The electromigration occurs at a critical power dissipation
in the neck of the bridge. This leads to Electromigrated Nanogaps
.
Feedback
Feedback describes the situation when output from an event or phenomenon in the past will influence an occurrence or occurrences of the same Feedback describes the situation when output from (or information about the result of) an event or phenomenon in the past will influence an occurrence or...
controlled electromigration (FCE) is an experimental technique to investigate the phenomenon known as electromigration
Electromigration
Electromigration is the transport of material caused by the gradual movement of the ions in a conductor due to the momentum transfer between conducting electrons and diffusing metal atoms. The effect is important in applications where high direct current densities are used, such as in...
. By controlling the voltage applied as the conductance varies it is possible to keep the voltage at a critical level for electromigration
Electromigration
Electromigration is the transport of material caused by the gradual movement of the ions in a conductor due to the momentum transfer between conducting electrons and diffusing metal atoms. The effect is important in applications where high direct current densities are used, such as in...
.
Theory
FCE has been shown to be reversible demonstrating the fact that it is the electrons doing the moving rather than thermomigration or sublimationSublimation
Sublimation may refer to:* Sublimation , the change from solid to gas without entering liquid phase* Sublimation , the transformation of emotions* Sublimation , a music album by Canvas Solaris-See also:...
. The migration occurs due to the electronic wind force
Ion wind
Ion wind, ionic wind, or coronal wind is a stream of ionized fluid generated by a strong electric field. Francis Hauksbee, curator of instruments for the Royal Society of London, made the earliest report of electric wind in 1709...
experienced by the metallic adatom. The electromigration occurs at a critical power dissipation
in the neck of the bridge. This leads to Electromigrated NanogapsElectromigrated nanogaps
Electromigrated Nanogaps are gaps formed in metallic bridges formed by the process of electromigration.-Theory:A nanosized contact formed formed by electromigration acts like a waveguide for electrons. The nanocontact essentially acts like a one-dimensional wire with a conductance of G =2e^2/h...
.