Fig. 3. Charge density difference without and with the gated electric field, when the S vacancy is (a) non-distributed and (c) uniformly distributed, respectively. The differences in charge density projected along the z-axis in the presence of (b) the non-distributed and (d) distributed S vacancies. The yellow and cyan vertical lines indicate the positions of S and Mo atoms, respectively. Schematic of charge accumulation and electric field in the presence of (e) the non-distributed and (f) distributed S vacancies, where red dots indicate.