Buried Spins in Slow Motion

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Science  31 Jul 1998:
Vol. 281, Issue 5377, pp. 656-657
DOI: 10.1126/science.281.5377.656

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For possible device applications, researchers are seeking to control the property of electrons known as spin. In most semiconductor structures, the polarized spin region is buried in the material, making it difficult to study. In their Perspective, Kikkawa and Awschalom discuss results reported in the same issue by Kuzma et al ., in which a novel method was used to probe the physical behavior of a spin system below the surface of the sample. The technique revealed a number of unexpected properties of this exotic system, including the fact that it can be manipulated with radio frequency pulses.