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

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

2011-11-25

arxiv.org/abs/1111.6031v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Changed title; Text lightly re-edited; Supplement added; Total 6 pages, 6 figures

Scientific paper

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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