With a twist in physics, scientists have devised a way to redistribute electricity on a small scale, potentially opening the way to more energy-efficient computing.In a new study, researchers at the department of energy’s argonne national laboratory (DOE) teamed up with French and Russian scientists to create a permanent static?/span> negative capacitor?A decade ago, the device was considered to violate the laws of physics.
Previously, negative capacitors were designed on a transient basis, and the new negative capacitors developed by argonne national laboratory are static reversible devices.The researchers found that a series of one negative capacitor and one positive capacitor, which locally increases the voltage of the positive capacitor above the total system voltage, allows the entire circuit to run at a lower voltage and distributes power to areas that require a higher voltage.?# 25105;Our goal is to use as little electricity as possible in a controlled, static environment and get it where it’s needed.# 35813;”Said Valerii Vinokur, argonne materials scientist and corresponding author of the study.
The negative capacitance proposed by Vinokur and his colleagues consists mainly of a ferroelectric material filler, similar to a magnet, but with an internal electrical polarization rather than a magnetic orientation.Vinokur said:?In ferroelectric nanoparticles, one surface is positively charged and the other negatively charged.And that creates an electric field that’s trying to depolarize the material, right?/ span >.By splitting a nanoparticle into two ferroelectric domains with opposite and equally polarized properties, separated by domain walls, Vinokur and his colleagues minimized the effects of depolarizing electric fields.Then, adding an electric charge to one of the ferroelectric domains changes the position of the domain walls.Due to the properties of nanoparticles, domain walls begin to shrink, causing them to shift beyond the new electrical equilibrium point.Lukyanchuk said:?In essence, you can think of a domain wall as a fully extended spring.When domain walls shift sideways due to an imbalance of charges, springs relax, releasing more elastic energy than expected.
Post time: Jun-20-2019