Probing phonon emission via hot carrier transport in suspended graphitic multilayers

TL;DR

This study investigates hot carrier transport in suspended graphitic multilayers under magnetic fields, revealing phonon-emission processes and cyclotron-phonon resonance effects that impact high-current transport and device performance.

Contribution

It provides new insights into phonon-emission mechanisms and magneto-phonon interactions in graphitic multilayers under magnetic fields.

Findings

Identification of high-energy dI/dV anomalies linked to phonon emission.

Observation of inter-Landau level cyclotron-phonon resonance scattering.

Implications for optimizing graphitic nano-electronic devices.

Abstract

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.