Current scaling and Dirac fermion heating in multi-layer graphene
Journal
Journal of Nanoscience and Nanotechnology
Journal Volume
15
Journal Issue
2
Pages
1195-1198
Date Issued
2015
Author(s)
Chuang, C.
Woo, T.-P.
Mahjoub, A.M.
Ouchi, T.
Hsu, C.-S.
Chin, C.-P.
Aoki, N.
Lin, L.-H.
Ochiai, Y.
Abstract
We have performed transport measurements on a multi-layer graphene device fabricated by conventional mechanical exfoliation. By using the zero-field resistance of our graphene device as a self-thermometer, we are able to determine the effective Dirac fermion temperature TDF at various driving currents I while keeping the lattice constant fixed. Interesting, it is found that TDF ∝ Iα, where α ∼ 1. According to theoretical and experimental studies, the exponent α is given by 2/(2 + p) where the charge-phonon scattering rate 1/τph is proportional to Tp. Therefore our results yield p ∼ 0, suggesting that there is little Dirac fermion-phonon scattering, a great advantage for applications in nanoelectronics.
SDGs
Type
journal article