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For more than a quarter of a century, high-temperature superconductors – materials that can transmit electric current without any resistance – have perplexed scientists who seek to understand the physical phenomena responsible for their unique properties.

Thanks to a new study by the U.S. Department of Energy’s (DOE) Argonne National Laboratory, researchers have identified and solved at least one paradox in the behavior of high-temperature superconductors. The riddle involves a phenomenon called the “pseudogap,” a region of energy levels in which relatively few electrons are allowed to exist.

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