Fig. 1: Crystal structures and phase diagram of GaSe–Ga2Se3.
From: MOCVD growth of covalent and 2D GaxSey: a phase validation and characterization
a Side (top) and top (bottom) views of GaSe generated using VESTA.103. b The obtained MOCVD phase diagram shows the GaSe to Ga2Se3 transition driven by increasing ΦSe/Ga or increasing temperature. The phases have been concluded from Raman spectroscopy of all samples (see Figs. S1–4). The gray and green background regions in the diagram serve as a guide to the eye, indicating the observed phase. One additional datapoint for a GaSe on Si(111) sample is taken from literature.44. c Structures of the high-temperature stable cubic α-Ga2Se3 (top), which features one-third gallium vacancy sites, and the low-temperature stable monoclinic β-Ga2Se3 (bottom), which is a superstructure of the α-phase. Both structures were generated using VESTA103.
