Collector phase transitions during vapor-solid-solid nucleation of GaN nanowires.
We investigate the nucleation of Ni-induced GaN nanowires by in situ and ex situ experiments. Three nucleation stages are evidenced. In the first two stages, different crystal structures of the Ni collectors are identified. Real-time monitoring of the Ga desorption allows the amount of Ga incorporated in the collectors to be quantified. A transition of their crystal structure prior to nanowire growth is found to be in agreement with the thermodynamically stable phase sequence of the relevant phase diagrams.
Chèze
Caroline
C
Paul-Drude-Institut für Festkorperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany. caroline.cheze@pdi-berlin.de
Geelhaar
Lutz
L
Trampert
Achim
A
Brandt
Oliver
O
Riechert
Henning
H