Suscripción a Biblioteca: Guest
Página principal de la Biblioteca Digital de ICHMT Año actual Archivos Comité Ejecutivo Centro Internacional de Transferencia de Calor y Masa

Electron-Phonon Transport in Graphene Devices

DOI: 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.540
pages 640-647

Liang Chen
School of Energy and Power Engineering, Xian Jiaotong University, Xian, Shanxi, China; Xi'an Jiaotong University Suzhou Academy, Suzhou 215123, P.R. China

Satish Kumar
George W. Woodruff School of Mechanical Engineering, 801 Ferst Drive, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA


In this study, we develop a computational model to investigate the thermal transport mechanisms in graphene devices, including phonon transport in graphene, electron-phonon coupling in graphene, and phonon/electron transmission at the interface between graphene and its surroundings. We employ this model to simulate coupled electron-phonon transport in SiO2-supported single layer graphene with metal electrodes at the two ends. The heat is generated using laser irradiation in the middle of the device. A two-temperature model is used for electrons, while the phonon transport is described by Boltzmann transport equations. The energy exchange between electrons and mode-dependent phonons is evaluated using the electron-phonon coupling strength determined from the first-principle calculations. The interfacial energy transfer is calculated using Landauer formalism, and the phonon and electron transmission is obtained from the Green's function calculations and the first principle calculations. We perform simulations with different graphene lengths and heating power, and analyze their effects on the heat dissipation through contacts of graphene. The work showed the relation between the dominated heat dissipation pathway and the important physical and structural parameters, which is critical for the thermal management and design of graphene nano-electronic devices.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH