Abstract
Using a focused laser beam, nanoscale current channels and nanoscale light emitting diodes (LEDs) have been made by the controlled thermal diffusion of manganese interstitial ions (Mri) out of a semiconductor heterostructure containing a layer of p-type ferromagnetic (GaMn)As. Here we use EDX, EELS and dark field imaging to probe directly the diffusion of Mn interstitials in the vicinity of the nano-LED region.
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