1108.2447 (Michal Lopuszynski et al.)

Ordering in ternary nitride semiconducting alloys    [PDF]

Michal Lopuszynski, Jacek A. Majewski

We present a thorough theoretical study of ordering phenomena in nitride
ternary alloys GaInN, AlInN, and AlGaN. Using the Monte Carlo approach and
energetics based on the Keating model we analyze the influence of various
factors on ordering in bulk crystals and epitaxial layers. We characterize the
degree of both short range order (SRO) and long ranger order (LRO) for
different compositions, temperatures and for substrates associated with
different epitaxial strain. For the description of the SRO the Warren-Cowley
parameters related to the first four coordination shells are used. The LRO is
detected by means of the introduced sim-LRO parameter, based on the
Bragg-Williams approach. The description of the observed long-range ordering
patterns and conditions for their occurrence follows.

View original: http://arxiv.org/abs/1108.2447