Lee JH, Gul HZ, Kim H, Moon BH, Adhikari S, Kim JH, Choi H, Lee YH, Lim SC.
Nano Lett. 2016 Dec 28. doi: 10.1021/acs.nanolett.6b03689. [Epub ahead of print]We achieve switching on/off the photocurrent of monolayer molybdenum disulfide (MoS2) by controlling the metal-insulator transition (MIT). N-type semiconducting MoS2 under a large negative gate bias generates a photocurrent attributed to the increase of excess carriers in the conduction band by optical excitation. However, under a large positive gate bias, a phase shift from semiconducting to metallic MoS2 is caused, and the photocurrent by excess carriers in the conduction band induced by the laser disappears due to enhanced electron-electron scattering. Read More