D. DRAGOMAN, M. DRAGOMAN, A.
Graphene – A One-Atom-Thick Material for Microwave Devices
Abstract. The graphene is a native one-atom-thick crystal consisting of a
single sheet of carbon atoms. In this material discovered in 2005, the electron
transport is ballistic at room temperature and is described by a quantum
relativistic-like Dirac equation rather than by the Schrödinger equation. Also,
graphene has a Young modulus of 1.5 TPa. Due to these unique properties .graphene
is considered to be a very promising material for high frequency nanoelectronic
devices such as oscillators and switches. In this paper, we will show that a
single graphene barrier acts as a switch with a very high on-off ratio and
displays a significant differential negative resistance at frequencies beyond
1THz. Also, we will show that graphene can be used in a very efficient RF-NEMS
switch for microwave applications.
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