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Supercomputers Without Waste Heat


A scanning tunneling microscope installed in a helium cooling device.

Researchers at the University of Konstanz in Germany have demonstrated that lossless electrical transfer of magnetically encoded information is possible.

Credit: Simon Diesch

A team of researchers at the University of Konstanz in Germany has demonstrated that lossless electrical transfer of magnetically encoded information is possible, a milestone that will improve storage density on integrated circuit chips while reducing the energy consumption of computing centers.

The team followed an approach founded on dissipation-free charge transport in superconducting building blocks.

In conventional superconductors, current is conveyed by pairs of electrons with opposite magnetic moments, which are nonmagnetic and cannot carry magnetic information.

Recent findings imply that bringing superconductors into contact with special magnetic materials can bind electrons with parallel spins into pairs that carry the supercurrent over longer distances through magnets.

Said Konstanz's Simon Diesch, "We showed that it is possible to create and detect these spin-aligned electron pairs" using tailor-made samples comprised of aluminum and europium sulfide.

From University of Konstanz
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