Fig. 4
From: Abnormal band bowing effects in phase instability crossover region of GaSe1-xTe x nanomaterials
Direct observation of phase transition. a Optical image of a GaSe1−xTe x flake with both hexagonal (region-I) and monoclinic (region-II) phase grown simultaneously. The composition for each region is indicated by Te% in the figure. Scale bar = 5 μm. b Raman spectra taken at region-I and region-II from a. c Angle resolved Raman peak intensity of peak A and B from region-I and II. d PL spectra taken at region-I and II. GaAs substrate peak is labeled by green background. e PL mapping of the emission intensity at 1.74 eV taken from the area indicated by the rectangular in a. f Schematic of the 3D atomic structure of the coexisting hexagonal and monoclinic phases
