Cyclotron resonance in bilayer graphene
| Autor: | Henriksen, E. A., Jiang, Z., Tung, L. -C., Schwartz, M. E., Takita, M., Wang, Y. -J., Kim, P., Stormer, H. L. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 100, 087403 (2008) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.100.087403 |
| Popis: | We present the first measurements of cyclotron resonance of electrons and holes in bilayer graphene. In magnetic fields up to B = 18 T we observe four distinct intraband transitions in both the conduction and valence bands. The transition energies are roughly linear in B between the lowest Landau levels, whereas they follow \sqrt{B} for the higher transitions. This highly unusual behavior represents a change from a parabolic to a linear energy dispersion. The density of states derived from our data generally agrees with the existing lowest order tight binding calculation for bilayer graphene. However in comparing data to theory, a single set of fitting parameters fails to describe the experimental results. Comment: to appear in Phys. Rev. Lett. Updated version with two added references and minor text editing |
| Databáze: | arXiv |
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