Fig. 2 | Nature Communications

Fig. 2

From: Abnormal band bowing effects in phase instability crossover region of GaSe1-xTe x nanomaterials

Fig. 2The alternative text for this image may have been generated using AI.

Vibrational properties and bandgap as a function of composition. a Raman spectra of GaSe1−xTe x nanostructures at different compositions. Monoclinic and hexagonal structures are separated by different background colors. b Peak positions of different Raman modes as a function of Te content in GaSe1−xTe x . Blue background indicates the hexagonal side and yellow background indicates the monoclinic side. c PL spectra of GaSe1−xTe x nanostructures at different compositions. d Bandgap as a function of Te content in GaSe1−xTe x . Error bars indicate standard deviation of PL peak position measured from five or more points on the same sample. e Evolution of angle resolved Raman peak intensity as Te content decreases. f, g DFT cluster expansion calculations at a variety of elemental composition shows that there exists a crossover region in formation energies of hexagonal to monoclinic phase GaSeTe systems

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