Semiconductor Sandwich (IMAGE)
Caption
By varying the thickness of the layers of semiconductor sandwiches made from silicon (grey area), bismuth-telluride, an n-type semiconductor (red area) and antimony telluride, a p-type semiconductor (green), topological insulators can be customized according to needs, as shown by the experiments conducted by researchers from Jülich and Aachen. The quality of the layers they produced using molecular beam epitaxy were verified by ultra high-resolution scanning electron microscopy. The atomic layers are clearly visible on the left side of the cube's edge.
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Forschungszentrum Jülich
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