Electron-phonon cooling in large monolayer graphene devices

Abstract

We present thermal measurements of large area (over $1,000$~$\mu$m${}^2$) 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-Gruneisen temperature $T_{\mathrm{BG}}$, the electron-phonon cooling power is accurately described by the $T^4$ temperature dependence predicted for clean samples. Using this model, we are able to extract a value for the electron-phonon coupling constant as a function of gate voltage, and the graphene electron-lattice deformation potential. We also present results for thermal conductance at higher temperatures, above $T_{\mathrm{BG}}/4$, for which the clean limit no longer applies. In this regime we find a cooling power which is accurately described qualitatively, but not quantitatively, by a model which predicts the emission of very high energy phonons through a disorder-assisted mechanism.

8 pages, 7 figures

References in corpus (9)

• Suspended Graphene: a bridge to the Dirac point
• Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
• Temperature dependent transport in suspended graphene
• Controlling electron-phonon interactions in graphene at ultra high carrier densities
• Electron-phonon heat transfer in monolayer and bilayer graphene
• Supercollision cooling in undoped graphene
• Hot electron cooling by acoustic phonons in graphene
• Electron-phonon mediated heat flow in disordered graphene
• Monolayer graphene bolometer as a sensitive far-IR detector

Cited by in corpus (24)

• Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
• Efficient Electrical Detection of Mid-Infrared Graphene Plasmons at Room Temperature
• Terahertz Nonlinearity in Graphene Plasmons
• Graphene-based Josephson junction single photon detector
• Raman spectroscopy of graphene under ultrafast laser excitation
• Supercurrent Flow in Multi-Terminal Graphene Josephson Junctions
• Fast thermal relaxation in cavity-coupled graphene bolometers with a Johnson noise read-out
• A graphene Zener-Klein transistor cooled by a hyperbolic substrate
• Slow noncollinear Coulomb scattering in the vicinity of the Dirac point in graphene
• Photothermal Engineering of Graphene Plasmons
• Ultrafast Topological Engineering in Metamaterials
• Tunable Ultrafast Thermal Relaxation in Graphene Measured by Continuous-Wave Photomixing
• Resonant supercollisions and electron-phonon heat transfer in graphene
• Spatial and energy resolution of electronic states by shot noise
• Bloch-Grüneisen temperature and universal scaling of normalized resistivity in doped graphene revisited
• Non-equilibrium properties of graphene probed by superconducting tunnel spectroscopy
• Coherent Manipulation of Thermal Transport by Tunable Electron-Photon and Electron-Phonon Interaction
• Flexural phonons in supported graphene: from pinning to localization
• Thermodynamics of a phase-driven proximity Josephson junction
• Sub-Kelvin Lateral Thermal Transport in Diffusive Graphene
• Self-heating effects and switching dynamics in graphene multiterminal Josephson junctions
• Performance limits due to thermal transport in graphene single-photon bolometers
• Wiedemann-Franz behavior at the Weyl points in compressively strained HgTe
• Disorder-assisted Robustness of Ultrafast Cooling in High Doped CVD-Graphene