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Spin-Related Current Suppression in a Semiconductor Quantum Dot Spin-Diode Structure

机译：半导体量子点自旋二极管结构中自旋相关的电流抑制

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摘要

We experimentally study the transport features of electrons in a spin-diode structure consisting of a single semiconductor quantum dot (QD) weakly coupled to one nonmagnetic and one ferromagnetic (FM) lead, in which the QD has an artificial atomic nature. A Coulomb stability diamond shows asymmetric features with respect to the polarity of the bias voltage. For the regime of two-electron tunneling, we find anomalous suppression of the current for both forward and reverse bias. We discuss possible mechanisms of the anomalous current suppression in terms of spin blockade via the QD-FM interface at the ground state of a two-electron QD.
机译：我们实验研究自旋二极管结构中的电子的传输特性，该结构由与一个非磁性和一个铁磁（FM）引线弱耦合的单个半导体量子点（QD）组成，其中该QD具有人工原子性质。库仑稳定性金刚石相对于偏置电压的极性显示出不对称的特征。对于双电子隧穿机制，我们发现正向和反向偏置均会异常抑制电流。我们讨论了在双电子QD的基态下通过QD-FM接口通过自旋阻滞抑制异常电流的可能机制。

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  • 来源
    《Physical review letters》 |2009年第23期|216-219|共4页
  • 作者

    K. Hamaya; M. Kitabatake; K. Shibata; M. Jung; S. Ishida; T. Taniyama; K. Hirakawa; K. Hirakawa; Y. Arakawa; T. Machida;

  • 作者单位

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Institute for Nano Quantum Information Electronics, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Department of Electronics, Kyushu University, 744 Nishi-ku, Fukuoka 819-0395, Japan PRESTO-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan PRESTO-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Institute for Nano Quantum Information Electronics, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Institute for Nano Quantum Information Electronics, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan CREST-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Institute for Nano Quantum Information Electronics, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;

    Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Institute for Nano Quantum Information Electronics, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan CREST-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

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  • 正文语种 eng
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  • 关键词

    quantum dots; magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields;

    机译：量子点;磁电子学自旋电子学：利用自旋极化传输或集成磁场的设备;

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