Journal
PHYSICAL REVIEW B
Volume 86, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.045314
Keywords
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Funding
- US National Science Foundation [DMR 0819860]
- Army Research Office [ARO W911NF-11-1-0379]
- Defense Advanced Research Projects Agency under SPAWAR [N66001-11-1-4110]
- NSF [DMR-084173]
- State of Florida
- Department of Energy
- China Scholarship Council (CSC)
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We report measurements of the surface Shubnikov-de Haas oscillations (SdH) on crystals of the topological insulator Bi2Te2Se. In crystals with large bulk resistivity (similar to 4 Omega cm at 4 K), we observe similar to 15 surface SdH oscillations (to the n = 1 Landau level) in magnetic fields B up to 45 T. Extrapolating to the limit 1/B -> 0, we confirm the 1/2-shift expected from a Dirac spectrum. The results are consistent with a very small surface Lande g factor.
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