Sub-Poissonian shot noise in graphene.
By J. Tworzydło, B. Trauzettel, M. Titov, A. Rycerz, C. Beenakker. Physical Review Letters, 2006
623 citations recorded by the source corpus.
We calculate the mode-dependent transmission probability of massless Dirac fermions through an ideal strip of graphene (length L, width W, no impurities or defects) to obtain the conductance and shot noise as a function of Fermi energy. We find that the minimum conductivity of order e2/h at the Dirac point (when the electron and hole excitations are degenerate) is associated with a maximum of the Fano factor (the ratio of noise power and mean current). For short and wide graphene strips the Fano factor at the Dirac point equals 1/3, 3 times smaller than for a Poisson process. This is the same value as for a disordered metal, which is remarkable since the classical dynamics of the Dirac fermions is ballistic.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/e57d2d1af994c53deddb7a57756fa726586aaf8a
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In Atomic and Molecular Physics, and Optics
In Materials Chemistry
Citations in the corpus
- Colloquium: The transport properties of graphene: An introduction (2010, background): “The scattering problem requires writing the wave function on the left and right leads, and on the central region (Katsnelson, 2006; Tworzydlo et al., 2006).”
- Charge transport in disordered graphene-based low dimensional materials (2008, methodology): “This theoretical result has been tested numerically by calculations based on a tight-binding model [77, 79], and a good agreement was found, as shown in Fig.”
- Electronic transport in two-dimensional graphene (2010, background): “An important development in the understanding of graphene transport is the use of the formalism of Klein tunneling to address the question of graphene’s minimum conductivity (Katsnelson, 2006; Tworzydło et al., 2006).”
- Spin qubits in graphene quantum dots (2006, background): “It is known that in such a device the valley degeneracy is lifte”