Effects of the orientational superlattice on the electronic and vibrational properties of CuPt ordered GaInP alloys

Abstract

A brief review is given of studies on a new semiconductor superlattice -an orientational superlattice -observed recently in spontaneously ordered III-V alloys GaInP. New experimental data, including band edge optical transitions and Raman transitions, are presented to illustrate the unique and intrinsic properties of orientational superlattices.

Effects of bond relaxation on the martensitic transition and optical phonons in spontaneously orderedGaInP2

“…However, most of the experimental Raman data reported to date [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] do not account for this intrinsic lattice property of spontaneously ordered GaInP 2 and thus the analysis presented in these papers; which assumes a changing of the symmetry only, is not complete. The properties of the optical phonons of the GaInP 2 CuPt structure were also studied theoretically using microscopic lattice dynamical calculations for shell ͑unrelaxed 4 ͒ and first-principles ͑relaxed 23,24 ͒ models.…”