BULK QUANTUM HALL EFFECT : EVIDENCE THAT SURFACE STATES PLAY A KEY ROLE
BULK QUANTUM HALL EFFECT : EVIDENCE THAT SURFACE STATES PLAY A KEY ROLE
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DOI：
10.1103/physrevb.55.r4891
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发表时间：
1997-02
影响因子：
3.7
通讯作者：
S. Hill;P. S. Sandhu;J. Qualls;J. Brooks;M. Tokumoto;N. Kinoshita;T. Kinoshita;Yukio Tanaka
中科院分区：
文献类型：
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作者：
S. Hill;P. S. Sandhu;J. Qualls;J. Brooks;M. Tokumoto;N. Kinoshita;T. Kinoshita;Yukio Tanaka
最近有人提出，α-(BEDT-TTF) 2 MHg (SCN) 4 盐（M= K 和 Tl）在高场表现出体量子霍尔效应 [Harrison et al., Phys.莱特牧师。 77, 1576 (1996)]。我们已经通过实验检验了有关这种条件下电流传输的预测。我们发现高场舒布尼科夫-德哈斯振荡表现出复杂的温度依赖性，这在同一样品的德哈斯-范阿尔芬测量中并不明显。这些差异可以通过样品整体运输和表面运输之间的竞争来解释。
It has been suggested recently that the α-(BEDT-TTF) 2 MHg (SCN) 4 salts (M= K and Tl) exhibit a bulk quantum Hall effect at high fields [Harrison et al., Phys. Rev. Lett. 77, 1576 (1996)]. We have examined experimentally predictions concerning the transport of current under such conditions. We find that the high field Shubnikov–de Haas oscillations exhibit a complicated temperature dependence, which is not evident in de Haas–van Alphen measurements on the same samples. These differences may be explained in terms of the competition between transport via the bulk and via the surface of the sample.