Probing phonon emission via hot carrier transport in suspended graphitic multilayers

Details Probing phonon emission via hot carrier transport in suspended graphitic multilayers Probing phonon emission via hot carrier transport in suspended graphitic multilayers

2010-04-18

arxiv.org/abs/1004.2987v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 pages, 5 figures, plus supplementary materials (3 pages)

Scientific paper

10.1016/j.ssc.2011.08.013

We study hot carrier transport under magnetic fields up to 15 T in suspended graphitic multilayers through differential conductance (dI/dV) spectroscopy. Distinct high-energy dI/dV anomalies have been observed and shown to be related to intrinsic phonon-emission processes in graphite. The evolution of such dI/dV anomalies under magnetic fields is further understood as a consequence of inter-Landau level cyclotron-phonon resonance scattering. The observed magneto-phonon effects not only shed light on the physical mechanisms responsible for high-current transport in graphitic systems, but also offer new perspectives for optimizing performance in graphitic nano-electronic devices.

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