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Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
Mesoscale and Nanoscale Physics · Submitted 20 Nov 2011
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim 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.
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The abstract, sentence by sentence
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 dependence and power-law cooling dynamics provide clear experimental signatures of this new cooling mechanism. The cooling rate can be changed by orders of magnitude by varying the amount of disorder which offers means for a variety of new applications that rely on hot-carrier transport.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | 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. | result 0.83 | 0.83 | 0.90 | asserted 0.46 |
| s1 | 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. | interpretation 0.93 | 0.35 | 0.05 | asserted 1.00 |
| s2 | The characteristic $T^3$ temperature dependence and power-law cooling dynamics provide clear experimental signatures of this new cooling mechanism. | result 0.86 | 0.55 | 0.12 | asserted 0.99 |
| s3 | The cooling rate can be changed by orders of magnitude by varying the amount of disorder which offers means for a variety of new applications that rely on hot-carrier transport. | interpretation 0.66 | 0.54 | 0.11 | asserted 0.87 |
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The paper
Original abstract
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 dependence and power-law cooling dynamics provide clear experimental signatures of this new cooling mechanism. The cooling rate can be changed by orders of magnitude by varying the amount of disorder which offers means for a variety of new applications that rely on hot-carrier transport.
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How the literature uses it
9 arXiv papers cite this in 27 sentences
Papers citing it · 19 sentences without a confident label
Uses its method or tool 2 papers
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Straightforward calculation along similar lines as discussed in Refs. [ref] gives the second-order matrix element for electron scattering from $k⃗$ to $k⃗'k⃗$:
Energy transport via multiphonon processes in graphene · Multiphonon processes · 0.86
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The electron dynamics are usually described by $ΔT_E∝(-t/τ_E)$, and can be estimated with [ref] , [equation] where $C=dE/dT_E$ is the electron specific heat and $E$ is the energy density of graphene.
Cooling of photoexcited carriers in graphene by internal and substrate phonons · Competing cooling pathways · 0.83
Compares with it 1 paper
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In contrast, the corresponding $q$-dependence in Ref. [ref] can be traced to the energy of a virtual electronic state in a second-order process involving both $e$-phonon and $e$-impurity scattering events.
Electron-phonon mediated heat flow in disordered graphene · Deformation potential heat flux · 0.99
Cites it as background 2 papers
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At higher temperatures, above $T_BG$, a different form of electron-phonon scattering is predicted [ref] in which disorder in the graphene allows large momentum phonons to be emitted from the electron system.
Electron-phonon cooling in large monolayer graphene devices · Disorder-assisted scattering · 0.91
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We note that a recent study examined disorder effects on electron-phonon interactions above the BG temperature [ref] .
Electron-phonon mediated heat flow in disordered graphene · Introduction · 0.86
What it cites · 2 sentences without a confident label
Cites as background 1 paper
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We note that other phonons (particularly, substrate surface phonons [ref] ) may also contribute to cooling [ref] .
Non-linear resistivity and heat dissipation in monolayer graphene · Introduction · 0.91
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