Temperature Dependence of Joule heating in Zigzag Graphene Nanoribbon

TL;DR

This study investigates how Joule heating in zigzag graphene nanoribbons varies with temperature, revealing linear increases over time and highlighting the effects of scattering rates at different temperatures.

Contribution

It provides a detailed analysis of temperature effects on Joule heating using full-band electron and phonon dispersion relations in zigzag graphene nanoribbons.

Findings

Joule heating increases linearly with time at all tested temperatures.

Higher scattering rates at elevated temperatures do not proportionally increase Joule heating.

Joule heating power at 900 K and 600 K is only 12.6 and 6.7 times higher than at 300 K.

Abstract

Using full-band electron and phonon dispersion relation, we investigate the temperature dependence of Joule heating in Zigzag Graphene Nanoribbons under high-field. At different temperatures of 300 K, 600 K, and 900 K, the Joule heating always increases linearly with time or the power is a constant. Although the scattering rates at 900 K and 600 K are 113 and 55 times higher than that of 300 K, the Joule heating power of 900 K and 600 K are just 12.6 and 6.7 timers higher than that of 300 K.