Phys. Rev. Lett. 64, 36–39 (1990)Stability of coherently strained semiconductor superlatticesReceived 11 September 1989; published in the issue dated 1 January 1990 The excess energy of several III-V and II-VI strained-layer semiconductor superlattices (AC)p(BC)p is studied as a function of the repeat period p and orientation G=[001], [110], [111], and [201], using first-principles calculations. We discover a number of universal features, including the predicted instability for nearly all p’s and G’s with respect to bulk disproportionation, the identification of chalcopyrite as a metastable ordered structure, and the stability of all thin epitaxial [110] and [201] and most common-anion [001] superlattices relative to coherent phase separation. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.64.36
DOI:
10.1103/PhysRevLett.64.36
PACS:
68.65.+g, 61.55.Hg, 68.60.Dv
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