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Spin transport properties of a carbon nanotube/zigzag graphene nanoribbon junction: a first principles investigation

机译：碳纳米管/锯齿形石墨烯纳米带结的自旋输运性质：第一个原理研究

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摘要

A carbon nanotube (CNT)/zigzag graphene nanoribbons (ZGNRs) junctions has been proposed and investigated by first-principles calculations. The results show that large spin polarization of currents would be achieved when only one edge of ZGNR is coupled to the other lead. By virtue of spatial separation of edge state in two spin channel, one of those channels is opened at certain energy range and gives rise to spin-polarized currents under a low bias. This feature is stable whenever the ZGNR lead is under the antiferromagnetic ground states or is under the ferromagnetic states. Our findings indicate that this approach is simple and efficient for spintronics design.
机译：已经提出了碳纳米管（CNT）/锯齿形石墨烯纳米带（ZGNRs）连接，并通过第一性原理计算进行了研究。结果表明，只有ZGNR的一个边缘与另一条引线耦合时，才能实现电流的大自旋极化。由于两个自旋通道中边缘状态的空间分离，这些通道之一在一定的能量范围内打开，并在低偏置下产生自旋极化电流。只要ZGNR引线处于反铁磁基态或处于铁磁态，此功能就稳定。我们的发现表明，这种方法对于自旋电子学设计是简单有效的。

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  • 来源
    《Applied Physics》 |2014年第4期|2175-2181|共7页
  • 作者

    Haiping Yu; Jiming Zheng; Ping Guo; Zhiyong Zhang;

  • 作者单位

    National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069, People's Republic of China;

    National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069, People's Republic of China;

    National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069, People's Republic of China;

    School of Information Science and Technology, Northwest University, Xi'an 710069, People's Republic of 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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  • 正文语种 eng
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