A superlattice is a periodic structure formed by alternating layers of two or more different materials, typically semiconductors, on a nanometer scale. These layers can be only a few nanometers thick and are engineered to create unique electronic, optical, or mechanical properties that differ from those of the individual materials. The properties of superlattices arise from quantum mechanical effects, specifically when the layer thickness approaches the electron mean free path or the de Broglie wavelength of electrons.
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