Nonunique structure of metastable (GaSb)1x(Ge2)x alloys

E. A. Stern, F. Ellis, K. Kim, L. Romano, S. I. Shah, and J. E. Green
Phys. Rev. Lett. 54, 905 – Published 4 March 1985
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Abstract

A combination of x-ray diffraction and extended x-ray-absorption fine-structure analyses were used to show that an order-disorder structural transition from zinc blende-to-diamond occurs in metastable (GaSb)1x(Ge2)x alloys at a critical composition xc even though the short-range order remains perfect throughout; i.e., there is no evidence for Ga-Ga or Sb-Sb bonds in either the zinc-blende or the diamond structure. However, the critical composition xc was found to depend upon the film growth conditions and a model is presented which explains this result on the basis of morphological effects on film growth kinetics.

  • Received 3 December 1984

DOI:https://doi.org/10.1103/PhysRevLett.54.905

©1985 American Physical Society

Authors & Affiliations

E. A. Stern, F. Ellis, and K. Kim

  • Department of Physics, FM-15, University of Washington, Seattle, Washington 98195

L. Romano, S. I. Shah, and J. E. Green

  • Department of Metallurgy, Coordinated Science Laboratory, Materials Research Laboratory, University of Illinois Urbana, Illinois 61801

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Vol. 54, Iss. 9 — 4 March 1985

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