Journal
PHYSICAL REVIEW B
Volume 85, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.205407
Keywords
-
Funding
- National Science Foundation [DMR-1006663, DMR-1105437, OISE-0968405, DMR-0654118]
- Department of Energy BES [DEFG02-06ER46308]
- Robert A. Welch Foundation [C-1509]
- State of Florida
- Los Alamos National Laboratory
- DoD, Air Force Office of Scientific Research, National Defense Science and Engineering Graduate (NDSEG) [32 CFR 168a]
- UCOP
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1105437] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006663] Funding Source: National Science Foundation
- Office Of Internatl Science &Engineering
- Office Of The Director [968405] Funding Source: National Science Foundation
Ask authors/readers for more resources
Using ultrahigh magnetic fields up to 170 T and polarized midinfrared radiation with tunable wavelengths from 9.22 to 10.67 mu m, we studied cyclotron resonance in large-area graphene grown by chemical vapor deposition. Circular polarization dependent studies reveal strong p-type doping for as-grown graphene, and the dependence of the cyclotron resonance on radiation wavelength allows for a determination of the Fermi energy. Thermal annealing shifts the Fermi energy to near the Dirac point, resulting in the simultaneous appearance of hole and electron cyclotron resonance in the magnetic quantum limit, even though the sample is still p-type, due to graphene's linear dispersion and unique Landau level structure. These high-field studies therefore allow for a clear identification of cyclotron resonance features in large-area, low-mobility graphene samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available