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Tunable graphene system with two decoupled monolayers

Research output: Contribution to journalJournal article

Published

Article number172108
Journal publication date27/10/2008
JournalApplied Physics Letters
Journal number17
Volume93
Number of pages3
Original languageEnglish

Abstract

The use of two truly two-dimensional gapless semiconductors, monolayer and bilayer graphene, as current-carrying components in field-effect transistors (FET) gives access to new types of nanoelectronic devices. Here, we report on the development of graphene-based FETs containing two decoupled graphene monolayers manufactured from a single one folded during the exfoliation process. The transport characteristics of these newly-developed devices differ markedly from those manufactured from a single-crystal bilayer. By analyzing Shubnikov-de Haas oscillations, we demonstrate the possibility to independently control the carrier densities in both layers using top and bottom gates, despite there being only a nanometer scale separation between them.