Polar metals are metals that are asymmetric under spatial inversion—a simultaneous flip in the sign of all three spatial coordinates. These materials are rare. Polar metals that are also magnetic are even rarer. Now, Hongrui Zhang at the University of California, Berkeley, and his colleagues have identified a material that behaves as a polar magnetic metal at room temperature [1]. This material has intriguing electric and magnetic properties that could make it useful for applications in spin-based electronics.
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