It is so thin, in fact, that it counts as the world’s first 2D magnet, with a thickness of just one atom. This counts as being functionally two-dimensional because electrons can only travel within the atomic sheet, akin to pieces moving on a chessboard. Up until now, no 3D magnetic substance has been able to retain its magnetic properties after being thinned down to a single atomic sheet.
The development demonstrates that magnetism can work in the 2D world, which could have major implications for building future quantum computers.
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Source: Digital Trends