Fig. 3From: Modulation of Electronic and Optical Anisotropy Properties of ML-GaS by Vertical Electric FieldBand structure of GaS ML a without an external electric field and b–d with an external electric field of 4, 5, and 8 V/nm, respectively. The dashed lines indicate the Fermi levels, which are set to zero. e Variation of the energy gap with the external electric field for GaS MLBack to article page