Heat Conduction across Monolayer and Few-Layer Graphenes

Abstract

We report the thermal conductance G of Au/Ti/graphene/SiO2 interfaces (graphene layers 1 < or = n < or = 10) typical of graphene transistor contacts. We find G approx. = 25 MW/sq m/K at room temperature, four times smaller than the thermal conductance of a Au/Ti/SiO2 interface, even when n = 1. We attribute this reduction to the thermal resistance of Au/Ti/graphene and graphene/SiO2 interfaces acting in series. The temperature dependence of G from 50 , < or = T < or = 500 K also indicates that heat is predominantly carried by phonons through these interfaces. Our findings suggest that metal contacts can limit not only electrical transport but also thermal dissipation from submicrometer graphene devices.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2010
Accession Number
ADA531895

Entities

People

  • David G. Cahill
  • Eric Pop
  • Myung-ho Bae
  • Yee Kan Koh

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Crystal Lattice Vibrations
  • Energy
  • Engineering
  • Field Effect Transistors
  • Films
  • Frequency
  • Graphene
  • Heat Capacity
  • Heat Transmission
  • Materials
  • Materials Laboratories
  • Materials Science
  • Metal Contacts
  • Self Assembled Monolayers
  • Semiconductors
  • Thermal Conductivity
  • Thermal Resistance

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene