Making new layered superconductors using high entropy alloys

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(Tokyo Metropolitan University) Researchers from Tokyo Metropolitan University have created new superconductors made of layers of bismuth sulfide (BiS2) and a high entropy rare earth alloy oxyfluoride, containing five different rare earth elements at the same crystallographic site. The new material retains superconducting properties over a wider range of lattice parameters than materials without high-entropy-alloy states. Their work promises an exciting new strategy for designing new layered superconductors, a potentially key development in the search for high-temperature superconductors.

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