Negative Capacitance reduces power consumption in transistors
Public Group active 2 years, 11 months agoA negative capacitance transistor consumes 35 % less energy than conventional devices.
A capacitor is a system that stores charge. The volume of of charge stored is proportional towards the voltage applied across its terminals.
The best analogy is that of a water tank. The amount of water stored (charge) is proportional to the depth of the tank (potential).
A negative capacitor device shows an area behavior — the charge stored decreases with current.
This phenomenon was predicted by Sayeef Salahuddin in 2008 and experimentally demonstrated in 2011.
He has now shown that this could be used to make a transistor that consumes less power.
Every transistor has three electrodes — besides the typical channel whereby the current flows, there’s also a gate electrode that decides if the current channel is open or not.
This channel was replaced by an undesirable capacitor.
Negative capacitance naturally arises in ferroelectric materials, whose spontaneous electric polarization can be reoriented using the application of an external electric field.
A very thin (2 nanometer thick) alternating, atom-thick layers of the strongly dielectric, ferroelectric material, hafnium dioxide, and the antiferroelectric compound zirconium dioxide formed the capacitor metal.
Since associated with transistors make up any microchip, the potential savings could be significant.
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