1. Current Scaling and Dirac Fermion Heating in Multi-Layer Graphene
- Author
-
Chang-Shun Hsu, Chi-Te Liangl, Tak-Pong Woo, Takahiro Ouchi, Nobuyuki Aoki, Akram M. Mahjoub, Chia-Pei Chin, L.-H. Lin, Chiashain Chuang, and Yuichi Ochiai
- Subjects
Physics ,Condensed matter physics ,Scattering ,Graphene ,Dirac (software) ,Biomedical Engineering ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,law.invention ,symbols.namesake ,Lattice constant ,Dirac fermion ,Nanoelectronics ,law ,Scattering rate ,Quantum mechanics ,symbols ,General Materials Science ,Scaling - 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 is proportional to Ia where a ~ 1. According to theoretical and experimental studies, the exponent a 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.
- Published
- 2015
- Full Text
- View/download PDF