Surface state dominated transport in topological insulator Bi2Te3 nanowires

被引：59
|
作者：
Hamdou, Bacel [1 ]
Gooth, Johannes [1 ]
Dorn, August [1 ]
Pippel, Eckhard [2 ]
Nielsch, Kornelius [1 ]
机构：
[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany
[2] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 19期
关键词：
Aharonov-bohm oscillations - Catalytic growth - Effective electrons - High carrier mobility - Low temperature magnetoresistance - Massless dirac fermions - Post annealing - Single-crystalline;
D O I：
10.1063/1.4829748
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on low temperature magnetoresistance measurements on single-crystalline Bi2Te3 nanowires synthesized via catalytic growth and post-annealing in a Te-rich atmosphere. The observation of Aharonov-Bohm oscillations indicates the presence of topological surface states. Analyses of Subnikov-de Haas oscillations in perpendicular magnetoresistance yield extremely low two-dimensional carrier concentrations and effective electron masses, and very high carrier mobilities. All our findings are in excellent agreement with theoretical predictions of massless Dirac fermions at the surfaces of topological insulators. (C) 2013 AIP Publishing LLC.
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页数：5
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