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arXiv 1111.6031cond-mat.mes-hall
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拓扑绝缘体Bi $_2$ Te $_2$ Se的高场Shubnikov-de Haas振荡

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

摘要:

本文报道了拓扑绝缘体Bi $_2$ Te $_2$ Se晶体表面Shubnikov de Haas振荡(SdH)的测量结果。在具有大体积电阻率($\sim$ 4 $Ω$厘米在4 K)的晶体中,我们观察到$\sim$ 15表面SdH振荡(到$n$ = 1朗道水平)在磁场$B$高达45特斯拉。外推到极限$1/B\to 0$,我们证实了$\frac12$ -位移预期从狄拉克光谱。结果与非常小的表面Lande $g$因子一致。

英文摘要:

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 $Ω$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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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