Photocurrent Switching of Monolayer MoS2 using Metal-Insulator Transition
Abstract
We achieve photocurrent switching of monolayer molybdenum disulfide (MoS2) by controlling the metal-insulator transition (MIT). N-type semiconducting MoS2 that is under a large negative gate bias, generates photocurrent by an optical excitation that is attributed to the increase of excess carriers in the conduction band. However, under a large positive gate bias that causes a phase shift from the semiconducting to a metallic MoS2 the photocurrent by excess carriers in the conduction band by the laser disappears by enhanced electron-electron scattering. Thus, no photocurrent is detected in metallic MoS2 Our results indicate that the photocurrent of MoS2 can be switched by MIT transition that is controllable using the gate bias.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2017
- Bibcode:
- 2017APS..MARH33009L