Researchers from Sweden, Germany and the US managed to develop an effective spin amplifier based on a non-magnetic semiconductor - that works at room temperature. The amplification occurs through deliberate defects in the form of extra gallium atoms introduced into an alloy of gallium, indium, nitrogen and arsenic.

Such a device can be used along a path of spin transport to amplify signals that have weakened along the way. By combining this with a spin detector, it may be possible to read even extremely weak spin signals.

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