Fig. 3
From: Electric Field Controlled Indirect-Direct-Indirect Band Gap Transition in Monolayer InSe
(Color online) Energy bands of the perpendicular electric field-modulated monolayer InSe at different strengths Ez=2.0 V/nm(a) and 6.0 V/nm (b), respectively. Red circles in a and b mean the opened energy gaps around the crossing points shown in Fig. 1c. c Energies at points A (the black solid line), B (the magenta dashed line), C (the blue dotted line), and D (the green dash-dotted line) shown in Fig. 1c as a function of the electric field strength. d Global band gap as a function of the strength of the electric field. The yellow line means the direct band gap while the red and blue lines indicate the indirect band gaps