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arXiv · 1111.6031

High-Field Shubnikov-de Haas Oscillations in the Topological Insulator Bi$_2$Te$_2$Se

Jun Xiong·Yongkang Luo·YueHaw Khoo·Shuang Jia·R. J. Cava·N. P. Ong
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Abstract

We report measurements of the surface Shubnikov de Haas oscillations (SdH) on crystals of the topological insulator Bi$_2$Te$_2$Se. In crystals with large bulk resistivity ($\sim$4 $\Omega$cm at 4 K), we observe $\sim$15 surface SdH oscillations (to the $n$ = 1 Landau Level) in magnetic fields $B$ up to 45 Tesla. Extrapolating to the limit $1/B\to 0$, we confirm the $\frac12$-shift expected from a Dirac spectrum. The results are consistent with a very small surface Lande $g$-factor.

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Jun Xiong, Yongkang Luo, YueHaw Khoo, Shuang Jia, R. J. Cava, N. P. Ong. 2011-11-25. High-Field Shubnikov-de Haas Oscillations in the Topological Insulator Bi$_2$Te$_2$Se. https://doi.org/10.1103/physrevb.86.045314

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