Surface Potentials and Layer Charge Distributions in Few-Layer Graphene Films
نویسندگان
چکیده
منابع مشابه
Charge carriers in few-layer graphene films.
The nature of the charge carriers in 2D few-layer graphites (FLGs) has been recently questioned by transport measurements [K. S. Novoselov, Science 306, 666 (2004)10.1126/science.1102896] and a strong ambipolar electric field effect has been revealed. Our density functional calculations demonstrate that the electronic band dispersion near the Fermi level, and consequently the nature of the char...
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Recently, it was demonstrated that the quasiparticle dynamics, the layer-dependent charge and potential, and the c-axis screening coefficient could be extracted from measurements of the spectral function of few layer graphene films grown epitaxially on SiC using angle-resolved photoemission spectroscopy (ARPES). In this article we review these findings, and present detailed methodology for extr...
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Nardeep Kumar,1 Jatinder Kumar,1 Chris Gerstenkorn,1 Rui Wang,1,2 Hsin-Ying Chiu,1 Arthur L. Smirl,2 and Hui Zhao1,* 1Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA 2Laboratory for Photonics and Quantum Electronics, University of Iowa, Iowa City, Iowa 52242, USA (Received 5 November 2012; revised manuscript received 13 February 2013; published 18 March 2013)
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In few-layer graphene (FLG) systems on a dielectric substrate such as SiO2, the addition of each extra layer of graphene can drastically alter their electronic and structural properties. Here, we map the charge distribution among the individual layers of finite-size FLG systems using a novel spatial discrete model that describes both electrostatic interlayer screening and fringe field effects. ...
متن کاملSpecific features of electric charge screening in few-layer graphene films.
We present a nonlinear Thomas-Fermi theory which describes the electric charge screening in a system including two charged substrate layers separated by a few-layered graphene film. We show that by increasing the charge at the interfaces, the system can be turned from the weak screening regime where the whole film responds to the external charge to the strong screening regime where the external...
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ژورنال
عنوان ژورنال: Nano Letters
سال: 2009
ISSN: 1530-6984,1530-6992
DOI: 10.1021/nl8009044