Fig. 1. Graphene-like structure of two-dimensional (2D) GaAs. (a) Model in first-principle calculation; (b) model in molecular dynamics

Fig. 2. Phonon spectral curves of 2D GaAs

Fig. 3. Energy band structure. (a) 2D GaAs; (b) 3D GaAs

Fig. 4. (a) Total density of states of 2D and 3D GaAs ; (b) partial density of states of Ga; (c) partial density of states of As

Fig. 5. Complex dielectric function. (a) 2D GaAs; (b) 3D GaAs

Fig. 6. (a) Absorption and (b) reflection spectra of 2D and 3D GaAs

Fig. 7. Energy loss function spectra of 2D and 3D GaAs