Team calculates the electronic transport properties of graphene stacks

Jun 23, 2011

Anticipating forthcoming experiments, a CNST team has shown that few layer graphene stacks have favorable transport properties that could enable engineering of novel electronic devices.

There has been significant research examining the properties of monolayer , single sheets of that can be extracted from bulk . However, the same extraction techniques can also make few-layer-thick stacks of graphene sheets.

In this work, the CNST team calculated how the number of sheets and their relative orientation affects the multilayers’electrical conductivity.

In the most energetically favorable case, where half of the carbon atoms on neighboring layers share the same x-y position, the researchers predicted that stacks of three or four sheets should not behave like bulk graphite, but rather like a collection of monolayer and bilayer graphene sheets.

In their calculations, these high-symmetry stacking arrangements exhibited properties particularly promising for future electronics, including a carrier mobility that was higher than that of either a graphene monolayer or bilayer with the same impurity concentration.

The calculations also found that if the stacks were sufficiently pure (comparable to the cleanest graphene monolayers reported in the literature), a transport measurement could be used to identify the number of layers, the stacking orientation, and whether the dominant disorder was due to short-range causes, such as missing , or long-range causes, such charged adsorbates.

Explore further: How we can substitute critical raw materials in catalysis, electronics and photonics

More information: Semiclassical Boltzmann transport theory for graphene multilayers, H. Min, P. Jain, S. Adam, and M. D. Stiles, Physical Review B 83, 195117 (2011). prb.aps.org/abstract/PRB/v83/i19/e195117

add to favorites email to friend print save as pdf

Related Stories

Producing graphene layers using crystallization

Mar 02, 2010

(PhysOrg.com) -- Ever since it's relatively recent discovery, graphene has generated a great deal of interest. Graphene is extracted from graphite in many cases, and consists of a sheet of carbon atoms bound together in a ...

Seeing an atomic thickness

May 19, 2011

Scientists from NPL, in collaboration with Linkoping University, Sweden, have shown that regions of graphene of different thickness can be easily identified in ambient conditions using Electrostatic Force ...

Shining Light on Graphene-Metal Interactions

Apr 02, 2010

(PhysOrg.com) -- By controlling the layered growth of graphene - a relatively "new" form of carbon that's just a single atom thick - researchers at Brookhaven National Laboratory have uncovered intriguing ...

Seeing Moire in Graphene

Apr 27, 2010

(PhysOrg.com) -- Researchers at the National Institute of Standards and Technology and the Georgia Institute of Technology have demonstrated that atomic scale moiré patterns, an interference pattern ...

Recommended for you

Semiconductor miniaturisation with 2D nanolattices

Feb 26, 2015

A European research project has made an important step towards the further miniaturisation of nanoelectronics, using a highly-promising new material called silicene. Its goal: to make devices of the future ...

Magnetic nanoparticles enhance performance of solar cells

Feb 25, 2015

Magnetic nanoparticles can increase the performance of solar cells made from polymers - provided the mix is right. This is the result of an X-ray study at DESY's synchrotron radiation source PETRA III. Adding ...

Researchers enable solar cells to use more sunlight

Feb 25, 2015

Scientists of the University of Luxembourg and of the Japanese electronics company TDK report progress in photovoltaic research: they have improved a component that will enable solar cells to use more energy of the sun and ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.