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arxiv: 1503.04312 · v2 · submitted 2015-03-14 · ❄️ cond-mat.mes-hall · cond-mat.mtrl-sci

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Transport and particle-hole asymmetry in graphene on boron nitride

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classification ❄️ cond-mat.mes-hall cond-mat.mtrl-sci
keywords featuresgraphenetransportasymmetryboroneffectiveelectronsexhibit
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All local electronic properties of graphene on a hexagonal boron nitride (hBN) substrate exhibit spatial moir\'e patterns related to lattice constant and orientation differences between shared triangular Bravais lattices. We apply a previously derived effective Hamiltonian for the $\pi$-bands of graphene on h-BN to address the carrier-dependence of transport properties, concentrating on the conductivity features at four electrons and four holes per unit cell. These transport features measure the strength of Bragg scattering of $\pi$-electrons off the moir\'e pattern, and exhibit a striking particle-hole asymmetry that we trace to specific features of the effective Hamiltonian that we interpret physically.

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