Unusual Shubnikov-de Haas oscillations in BiTeCl
Unusual Shubnikov-de Haas oscillations in BiTeCl
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BiTeCl 中异常的 Shubnikov-de Haas 振荡
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
D. Tanner
中科院分区：
文献类型：
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作者：
C. Martin;A. Suslov;S. Buvaev;A. Hebard;P. Bugnon;H. Berger;A. Magrez;D. Tanner
我们报告的测量Shubnikov-de哈斯振荡BiTeCl单晶在磁场高达31 T和温度低至0.4 K。两个振荡频率在最低温度下分辨，F-1 = 65 +/- 4 T和F-2 = 156 +/- 5 T。我们还测量了红外光学反射率[R（ω）]和霍尔效应，我们建议，这两个频率分别对应于内和外费米片的Rashba自旋分裂体导带。散装载流子浓度n（e）约为1 × 10（19）cm（-3），内层有效质量m（1）* = 0.20 m（0），外层有效质量m（2）* = 0.27 m（0）。令人惊讶的是，尽管它的有效质量低，我们发现，F-2的振幅是非常迅速地抑制随着温度的升高，几乎无法检测到以上T接近4 K。
We report measurements of Shubnikov-de Haas oscillations in single crystals of BiTeCl at magnetic fields up to 31 T and at temperatures as low as 0.4 K. Two oscillation frequencies were resolved at the lowest temperatures, F-1 = 65 +/- 4 T and F-2 = 156 +/- 5 T. We also measured the infrared optical reflectance [R(omega)] and Hall effect; we propose that the two frequencies correspond respectively to the inner and outer Fermi sheets of the Rashba spin-split bulk conduction band. The bulk carrier concentration was n(e) approximate to 1 x 10(19) cm(-3) and the effective masses m(1)* = 0.20m(0) for the inner and m(2)* = 0.27m(0) for the outer sheet. Surprisingly, despite its low effective mass, we found that the amplitude of F-2 is very rapidly suppressed with increasing temperature, being almost undetectable above T approximate to 4 K.