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arXiv · 1211.0559

Phonon mediated interlayer conductance in twisted graphene bilayers

V. Perebeinos·J. Tersoff·Ph. Avouris
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Abstract

Conduction between graphene layers is suppressed by momentum conservation whenever the layer stacking has a rotation. Here we show that phonon scattering plays a crucial role in facilitating interlayer conduction. The resulting dependence on orientation is radically different than previously expected, and far more favorable for device applications. At low temperatures, we predict diode-like current-voltage characteristics due to a phonon bottleneck. Simple scaling relationships give a good description of the conductance as a function of temperature, doping, rotation angle, and bias voltage, reflecting the dominant role of the interlayer beating phonon mode.

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V. Perebeinos, J. Tersoff, Ph. Avouris. 2013-01-03. Phonon mediated interlayer conductance in twisted graphene bilayers. https://doi.org/10.1103/physrevlett.109.236604

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