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New theory aims to explain superconductivity in iron pnictides


Superconductivity in iron pnictides was first observed in 2008, and they were hailed as the new cuprates. Some iron pnictides are metals, while others are insulators. But though dissimilar in that way, both can become superconductive at roughly the same temperature. A complete theoretical understanding of superconductivity pnictides has remained elusive, but a team from Rice University and Los Alamos National Lab have suggested in a paper in Physics Review Letters that ordered vacancies enhance the tendency of the electrons to lock themselves some distance away from their neighbors in a pattern called Mott localization, which gives rise to an insulating state. more

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