Abstract
Recent experimental and theoretical studies on two-dimensional (2D) antimonene revealed that this material is expected to be a potential semiconductor for optoelectronics applications. Using first-principle density functional theory (DFT) calculations, we verify that the so-called α-phase monolayer antimonene is a direct-gap semiconductor. Its optoelectronic properties are then described in terms of electron-photon interaction. Within the dipole approximation, the dipole vectors and the oscillator strength of the electron-photon interaction in monolayer antimonene were calculated. It has been found that the optical transition at a certain electronic wave vector can be analyzed according to the value and direction of the dipole vectors. This work will be important to further obtain the optical absorption spectra of monolayer antimonene for various light polarization.
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