Spin-polarised electrons on demand

Many hopes are pinned on spintronics. In the future it could replace electronics, which in the race to produce increasingly rapid computer components, must at sometime reach its limits. Different from electronics, where whole electrons are moved (the digital 'one' means 'an electron is present on the component,' zero means 'no electron present'), here it is a matter of manipulating a certain property of the electron, its spin...

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