Wiktionary
superlattice
n. A material with periodically alternating layers of several crystalline substances; especially such a semiconductor.
Wikipedia
Superlattice
A superlattice is a periodic structure of layers of two (or more) materials. Typically, the thickness of one layer is several nanometers. It can also refer to a lower-dimensional structure such as an array of quantum dots or quantum wires.
Usage examples of "superlattice".
Above him rose a blue superlattice cliff, stepped back like shattered strata of rock.