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Field emission from Dirac and Weyl semimetals

机译：Dirac和Weyl半金属的场发射

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摘要

Based on theoretical investigation on characteristics of the field emission current of Dirac/Weyl semimetals, the dependence of the field emission current on the applied bias is deduced and studied. This theoretical study demonstrates that the field emission current of a Dirac semimetal is much smaller than that of a conventional material when they have similar carrier parameters. This makes Dirac semimetal a better candidate for gate/ base electrode material than gold and other conventional metals for an ultra-thin gate oxide metal-oxide-semiconductor field effect transistor. The field emission current of a Dirac semimetal decreases with the effective electron mass, while it increases for a conventional material. This implies that such an effective mass dependence can be used as a simple criterion to probe a Dirac semimetal in practice.
机译：在对狄拉克/魏尔半金属场致发射电流特性进行理论研究的基础上，推导并研究了场致发射电流与外加偏压的关系。这项理论研究表明，当具有相似的载流子参数时，狄拉克半金属的场发射电流比常规材料的场发射电流小得多。与超薄型栅极氧化物金属-氧化物-半导体场效应晶体管的金和其他常规金属相比，这使得Dirac半金属成为栅极/基极电极材料的更好候选者。狄拉克半金属的场发射电流随有效电子质量而减小，而对于常规材料则增大。这意味着这种有效的质量依赖性可以用作在实践中探查狄拉克半金属的简单标准。

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  • 来源
    《Applied Physics》 |2016年第9期|870.1-870.6|共6页
  • 作者

    Ling-Feng Mao; X. Li; H. Ning; Changjun Hu; Gaofeng Wang;

  • 作者单位

    School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    Wenzhou Meta Optics Corporate Limited, Wenzhou 325000, China;

    School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China;

  • 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);
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