Transport in Nanoribbon Interconnects Obtained from Graphene Grown by Chemical Vapor Deposition

Abstract

We study graphene nanoribbon (GNR) interconnects obtained from graphene grown by chemical vapor deposition (CVD). We report low- and high-field electrical measurements over a wide temperature range, from 1.7 to 900 K. Room temperature mobilities range from 100 to 500 cm2/V/s, comparable to GNRs from exfoliated graphene, suggesting that bulk defects or grain boundaries play little role in devices smaller than the CVD graphene crystallite size. At high-field, peak current densities are limited by Joule heating, but a small amount of thermal engineering allows us to reach ~2 x 10^9 A/cm2, the highest reported for nanoscale CVD graphene interconnects. At temperatures below ~5 K, short GNRs act as quantum dots with dimensions comparable to their lengths, highlighting the role of metal contacts in limiting transport. Our study illustrates opportunities for CVD-grown GNRs, while revealing variability and contacts as remaining future challenges.

Nano Letters (2012); supplement available online

References in corpus (12)

• Electric Field Effect in Atomically Thin Carbon Films
• Energy Band Gap Engineering of Graphene Nanoribbons
• Energy Dissipation and Transport in Nanoscale Devices
• Graphene films with large domain size by a two-step chemical vapor deposition process
• Carrier Statistics and Quantum Capacitance of Graphene Sheets and Ribbons
• Mobility and Saturation Velocity in Graphene on SiO2
• Heat Conduction across Monolayer and Few-Layer Graphenes
• Mobility in Semiconducting Graphene Nanoribbons: Phonon, Impurity, and Edge Roughness Scattering
• Thermally-Limited Current Carrying Ability of Graphene Nanoribbons
• Quantum dot behavior in graphene nanoconstrictions
• Thermal Dissipation and Variability in Electrical Breakdown of Carbon Nanotube Devices
• Raman spectroscopy on etched graphene nanoribbons

Cited by in corpus (8)

• Thermal properties of graphene: Fundamentals and applications
• Ballistic to diffusive crossover of heat flow in graphene ribbons
• Effect of Grain Boundaries on Thermal Transport in Graphene
• Graphene field-effect transistors with gigahertz-frequency power gain on flexible substrates
• High Current Density and Low Thermal Conductivity of Atomically Thin Semimetallic WTe2
• Characterizing wave functions in graphene nanodevices: electronic transport through ultrashort graphene constrictions on a boron nitride substrate
• Theoretical analysis of high-field transport in graphene on a substrate
• Hysteresis-Free Nanosecond Pulsed Electrical Characterization of Top-Gated Graphene Transistors