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We report the first realization of a quasiperiodic (incommensurate) superlattice. The sample, grown by molecular-beam epitaxy, consists of alternating layers of GaAs and AlAs to form a Fibonacci sequence in which the ratio of incommensurate periods is equal to the golden mean. X-ray and Raman scattering measurements are presented that reveal some of the unique properties of these novel structures.
Merlín et al. (Mon,) studied this question.