Physics – Condensed Matter – Materials Science
Scientific paper
2008-01-29
Physics
Condensed Matter
Materials Science
Scientific paper
10.1021/nl080241l
Low-frequency 1/f noise is ubiquitous, and dominates the signal-to-noise performance in nanodevices. Here we investigate the noise characteristics of single-layer and bilayer graphene nano-devices, and uncover an unexpected 1/f noise behavior for bilayer devices. Graphene is a single layer of graphite, where carbon atoms form a 2D honeycomb lattice. Despite the similar composition, bilayer graphene (two graphene monolayers stacked in the natural graphite order) is a distinct 2D system with a different band structure and electrical properties. In graphene monolayers, the 1/f noise is found to follow Hooge's empirical relation with a noise parameter comparable to that of bulk semiconductors. However, this 1/f noise is strongly suppressed in bilayer graphene devices, and exhibits an unusual dependence on the carrier density, different from most other materials. The unexpected noise behavior in graphene bilayers is associated with its unique band structure that varies with the charge distribution among the two layers, resulting in an effective screening of potential fluctuations due to external impurity charges. The findings here point to exciting opportunities for graphene bilayers in low-noise applications.
Avouris Phaedon
Lin Yu-Ming
No associations
LandOfFree
Strong Suppression of Electrical Noise in Bilayer Graphene Nano Devices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strong Suppression of Electrical Noise in Bilayer Graphene Nano Devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong Suppression of Electrical Noise in Bilayer Graphene Nano Devices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-121146