Volume 94, Number 4, May 2011
|Number of page(s)||5|
|Published online||11 May 2011|
Quantum chaotic scattering in graphene systems
School of Electrical, Computer and Energy Engineering, Arizona State University - Tempe, AZ 85287, USA
2 Institute of Computational Physics and Complex Systems, and Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University - Lanzhou, Gansu 730000, China
3 Department of Physics, Arizona State University - Tempe, AZ 85287, USA
4 Institute for Complex Systems and Mathematical Biology, School of Natural and Computing Sciences, King's College, University of Aberdeen - Aberdeen, UK, EU
Accepted: 8 April 2011
We investigate the transport fluctuations in both non-relativistic quantum dots and graphene quantum dots with both hyperbolic and nonhyperbolic chaotic scattering dynamics in the classical limit. We find that nonhyperbolic dots generate sharper resonances than those in the hyperbolic case. Strikingly, for the graphene dots, the resonances tend to be much sharper. This means that transmission or conductance fluctuations are characteristically greatly enhanced in relativistic as compared to non-relativistic quantum systems.
PACS: 05.45.Mt – Quantum chaos; semiclassical methods / 72.80.Vp – Electronic transport in graphene / 73.23.-b – Electronic transport in mesoscopic systems
© EPLA, 2011
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