Compositional correlation and anticorrelation in quaternary alloys: competition between bulk thermodynamics and surface kinetics.
We analyze the atomistic mechanisms driving the compositional correlation of In and N in the quaternary Inx Ga1-xAs1-yNy alloys combining atomic scale chemical analysis in transmission electron microscopy and density-functional theory calculations. Our results show that for typical growth conditions surface kinetics prevail over bulk thermodynamics resulting in a hitherto unexpected compositional anticorrelation between In and N.
Albrecht
M
M
Institut für Kristallzüchtung, Max-Born-Strasse 2, 12489 Berlin, Germany.
Abu-Farsakh
H
H
Remmele
T
T
Geelhaar
L
L
Riechert
H
H
Neugebauer
J
J