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首页> 外文期刊>Journal of Applied Physics >Epitaxial growth of Bi_2Se_3 topological insulator thin films on Si (111)
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Epitaxial growth of Bi_2Se_3 topological insulator thin films on Si (111)

机译:Si(111)上Bi_2Se_3拓扑绝缘体薄膜的外延生长

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摘要

In this paper, we report the epitaxial growth of Bi2Se3 thin films on Si (111) substrate, using molecular beam epitaxy (MBE). We show that the as-grown samples have good crystalline quality, and their surfaces exhibit terracelike quintuple layers. Angel-resolved photoemission experiments demonstrate single-Dirac-conelike surface states. These results combined with the temperature- and thickness-dependent magneto-transport measurements, suggest the presence of a shallow impurity band. Below a critical temperature of ~100K, the surface states of a 7 nm thick film contribute up to 50% of the total conduction.
机译:在本文中,我们使用分子束外延(MBE)报告了在Si(111)衬底上Bi2Se3薄膜的外延生长。我们表明,所生长的样品具有良好的结晶质量,并且它们的表面表现出类似梯田的五重层。天使分辨的光发射实验证明了单狄拉克锥状表面状态。这些结果与温度和厚度相关的磁迁移率测量结果相结合,表明存在较浅的杂质带。在〜100K的临界温度以下,一个7 nm厚的薄膜的表面状态占总传导的50%。

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  • 来源
    《Journal of Applied Physics》 |2011年第10期|p.515-520|共6页
  • 作者单位

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA,Materials Engineering and Centre for Microcopy and Microanalysis, University of Queensland,Brisbane QLD 4072, Australia;

    Advanced Light Source Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley,CA 94720, USA;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

    Department of Physics, University of California, Riverside, California 92521, USA;

    Materials Engineering and Centre for Microcopy and Microanalysis, University of Queensland,Brisbane QLD 4072, Australia;

    Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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