Nanowires Exhibit Superconductivity Overcoming Metallic Interconnect Issues

Smallest known superconductor overcomes problems with nanoscale metallic interconnects

1 min read
Nanowires Exhibit Superconductivity Overcoming Metallic Interconnect Issues

One of the most vexing problems faced in nanoscale electronics has been that the more you decrease the size of the metallic interconnects the greater their resistance. This typically leads to Joule heating of the interconnects that melts and destroys them.

Researchers at the University of Ohio are reporting that they have created a molecule chain made from organic salt that exhibits superconductivity thereby bringing its resistance down to zero.

The research was initially published in Nature Nanotechnology and describes how the researchers were able to first synthesize the molecules of organic salt ((BETS)2-GaCl4) place them on a silver substrate and then with a scanning tunneling microscope were able to observe how when formed into groups as small as just four pairs could exhibit superconductivity.

While the research looked at the smallest limit to the superconductivity with the four pairs, it also noted that the best results were found in chains of the molecule longer than 50nm in length.

Beyond the claims that the researchers have created the smallest known superconductor, this work would seem to reopen the option of using metallic interconnects at this nanometer scale.

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The Ultimate Transistor Timeline

The transistor’s amazing evolution from point contacts to quantum tunnels

1 min read
A chart showing the timeline of when a transistor was invented and when it was commercialized.

Even as the initial sales receipts for the first transistors to hit the market were being tallied up in 1948, the next generation of transistors had already been invented (see “The First Transistor and How it Worked.”) Since then, engineers have reinvented the transistor over and over again, raiding condensed-matter physics for anything that might offer even the possibility of turning a small signal into a larger one.

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