A laser pulse hits nickel (green). Spin-up-electrons (red) change into silicon (yellow). Electrons with both spin-orientations change back from silicon into nickel. Credit: Image courtesy of Vienna University of Technology, TU Vienna
They are essential for spintronics, a technology that could replace today’s electronics.For years scientists have been working on elements using electrons angular momentum (their spin) rather than their electrical charge. This new approach, “spintronics” has major advantages compared to common electronics. It can operate with much less energy. TU Wien (Vienna) scientists have now proposed a new method to produce gigantic spin currents in a very small period of time. The secret is using ultra short laser pulses.
For every electron, 2 different spin-states are p...
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