High-Tech Crystal Learns to Waste Less Power
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Inside a thin film of strontium iridate, barely 27 nanometres thick, electrons do something that most metals cannot. They remember which way they’re spinning. Not in any mystical sense; the crystal’s geometry forces it, the atoms arranged in a pattern that links each electron’s momentum to its spin as surely as a screw thread links rotation to direction. Pull current through the material and a flood of spin-polarised electrons pours out sideways. The effect is, depending on you
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