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- Panchal, V., et al.
(author)
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Local electric field screening in bi-layer graphene devices
- 2014
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In: Frontiers of Physics. - : Frontiers Media SA. - 2296-424X. ; 2, s. 1-10
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Journal article (peer-reviewed)abstract
- © 2014 Panchal, Giusca, Lartsev, Yakimova and Kazakova. We present experimental studies of both local and macroscopic electrical effects in uniform single- (1LG) and bi-layer graphene (2LG) devices as well as in devices with non-uniform graphene coverage, under ambient conditions. DC transport measurements on sub-micron scale Hall bar devices were used to show a linear rise in carrier density with increasing 2LG coverage. Electrical scanning gate microscopy was used to locally top gate uniform and non-uniform devices in order to observe the effect of local electrical gating. We experimentally show a significant level of electric field screening by 2LG. We demonstrate that SGM technique is an extremely useful research tool for studies of local screening effects, which provides a complementary view on phenomena that are usually considered only within a macroscopic experimental scheme.
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