Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene

Disorder-assisted electron-phonon scattering and cooling pathways in graphene.

We predict that graphene is a unique system where disorder-assisted scattering (supercollisions) dominates electron-lattice cooling over a wide range of temperatures, up to room temperature. This is so because for momentum-conserving electron-phonon scattering the energy transfer per collision is severely constrained due to a small Fermi surface size. The characteristic T(3) temperature depende...

Electron-phonon cooling in large monolayer graphene devices

We present thermal measurements of large-area (over 1000 μm2) monolayer graphene samples at cryogenic temperatures to study the electron-phonon thermal conductivity of graphene. By using two large samples with areas which differ by a factor of 10, we are able to clearly show the area dependence of the electron-phonon cooling. We find that, at temperatures far below the Bloch-Grüneisen temperatu...

Spectral phonon conduction and dominant scattering pathways in graphene

Parity conservation in electron-phonon scattering in zigzag graphene nanoribbon

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Electron–phonon scattering in disordered metallic films

The quantum interference between ‘pure’ electron–phonon and electron-boundary/impurity scattering drastically changes the electron–phonon relaxation rate. If impurities and boundaries vibrate in the same way as the host lattice, the electron–phonon relaxation rate is significantly decreased. In the presence of the scattering potential that does not vibrate with phonons (e.g. rigid boundaries, i...