Sub-Kelvin Lateral Thermal Transport in Diffusive Graphene
arXiv:1812.11711 · doi:10.1103/PhysRevB.99.125427
Abstract
In this work, we report on hot carrier diffusion in graphene across large enough length scales that the carriers are not thermalized across the crystal. The carriers are injected into graphene at one site and their thermal transport is studied as a function of applied power and distance from the heating source, up to tens of micrometers away. Superconducting contacts prevent out-diffusion of hot carriers to isolate the electron-phonon coupling as the sole channel for thermal relaxation. As local thermometers, we use the amplitude of the Universal Conductance Fluctuations, which varies monotonically as a function of temperature. By measuring the electron temperature simultaneously along the length we observe a thermal gradient which results from the competition between electron-phonon cooling and lateral heat flow.
References in corpus (28)
- The electronic properties of graphene
- Controlling electron-phonon interactions in graphene at ultra high carrier densities
- Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
- Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
- Dual-gated bilayer graphene hot electron bolometer
- Anomalous thermoelectric transport of Dirac particles in graphene
- Phonon Transport in Graphene
- Photocurrent measurements of supercollision cooling in graphene
- Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
- Electronic Cooling in Graphene
- The thermopower and Nernst Effect in graphene in a magnetic field
- Electron-phonon heat transfer in monolayer and bilayer graphene
- Supercollision cooling in undoped graphene
- Hot electron cooling by acoustic phonons in graphene
- Supercurrent Flow in Multi-Terminal Graphene Josephson Junctions
- Observation of Supercurrent in PbIn-Graphene-PbIn Josephson Junction
- Ultra-sensitive and Wide Bandwidth Thermal Measurements of Graphene at Low Temperatures
- Electron-phonon mediated heat flow in disordered graphene
- Electron-phonon coupling in suspended graphene: supercollisions by ripples
- Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures
- Performance of Graphene Thermal Photon Detectors
- Quantum transport thermometry for electrons in graphene
- Electron-phonon cooling in large monolayer graphene devices
- Non-linear resistivity and heat dissipation in monolayer graphene
- Hot-Carrier Seebeck Effect: Diffusion and Remote Detection of Hot Carriers in Graphene
- Energy relaxation in graphene and its measurement with supercurrent
- Energy resolution of terahertz single-photon-sensitive bolometric detectors
- Nonlinear vs. bolometric radiation response and phonon thermal conductance in graphene-superconductor junctions
Cited by in corpus (4)
- Wiedemann-Franz law for massless Dirac fermions with implications for graphene
- Performance limits due to thermal transport in graphene single-photon bolometers
- Graphene resistivity in diffusive limit due to scalar and vector potential electron-phonon scattering
- Spectroscopy of Heat Transport and Violation of the Wiedemann--Franz Law in a GaAs Hydrodynamic Mesoscopic Channel