Aiming to use electron spins for storing, transporting and processing information, researchers from IBM and scientists at ETH Zurich revealed the first-ever direct mapping of the formation of a persistent spin helix in a semiconductor.
IBM scientists used ultra short laser pulses to monitor the evolution of thousands of electron spins that were created simultaneously in a very small spot. Atypically, where such spins would randomly rotate and quickly loose their orientation, for the first time, the scientists could observe how these spins arrange neatly into a regular stripe-like pattern, the so-called persistent spin helix.
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