Photocurrent Switching
of Monolayer MoS2 Using a Metal–Insulator Transition
Version 2 2017-01-11, 16:18
Version 1 2017-01-03, 17:49
Posted on 2017-01-11 - 16:18
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. Thus, no photocurrent
is detected in metallic MoS2. Our results indicate that
the photocurrent of MoS2 can be switched on/off by appropriately
controlling the MIT transition by means of gate bias.
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Lee, Jin Hee; Gul, Hamza Zad; Kim, Hyun; Moon, Byoung Hee; Adhikari, Subash; Kim, Jung Ho; et al. (2017). Photocurrent Switching
of Monolayer MoS2 Using a Metal–Insulator Transition. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.6b03689
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AUTHORS (9)
JL
Jin Hee Lee
HG
Hamza Zad Gul
HK
Hyun Kim
BM
Byoung Hee Moon
SA
Subash Adhikari
JK
Jung Ho Kim
HC
Homin Choi
YL
Young Hee Lee
SL
Seong Chu Lim