التفاصيل البيبلوغرافية
| العنوان: |
Phase-space for the breakdown of the quantum Hall effect in epitaxial graphene |
| المؤلفون: |
Alexander-Webber, J. A., Baker, A. M. R., Janssen, T. J. B. M., Tzalenchuk, A., Lara-Avila, S., Kubatkin, S., Yakimova, R., Piot, B. A., Maude, D. K., Nicholas, R. J. |
| سنة النشر: |
2013 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: |
We report the phase-space defined by the quantum Hall effect breakdown in polymer gated epitaxial graphene on SiC (SiC/G) as a function of temperature, current, carrier density, and magnetic fields up to 30T. At 2K breakdown currents ($I_c$) almost two orders of magnitude greater than in GaAs devices are observed. The phase boundary of the dissipationless state ($\rho_{xx}=0$) shows a (1-$(T/T_c)^2$) dependence and persists up to $T_c>45K$ at 29T. With magnetic field $I_c$ was found to increase $\propto B^{3/2}$ and $T_c \propto B^{1.88}$. As the Fermi energy approaches the Dirac point, the $\nu=2$ quantized Hall plateau appears continuously from fields as low as 1T up to at least 19T due to a strong magnetic field dependence of the carrier density. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.111.096601 |
| URL الوصول: |
http://arxiv.org/abs/1304.4897 |
| رقم الانضمام: |
edsarx.1304.4897 |
| قاعدة البيانات: |
arXiv |