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首页> 外文期刊>Journal of Materials Science >Multistate magnetoresistance in zigzag-edge trigonal graphene magnetic junctions
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Multistate magnetoresistance in zigzag-edge trigonal graphene magnetic junctions

机译：Z字形边缘三角形石墨烯磁性连接中的多剂态磁阻

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摘要

Using density functional theory combined with nonequilibrium Green's function method, spin-dependent transport through a zigzag-edge trigonal graphene molecule coupled with two ferromagnets was investigated. The results reveal that due to the intrinsic magnetism of the central graphene nanoflake, four spin configurations of the device can be achieved. By calculating the current-voltage characteristic, a three-state magnetoresistance effect is obtained companied with a large spin filtering efficiency. The intrinsic mechanism is explored as different shifts of the spin-split frontier molecular orbitals depending on the spin configurations of the device. This work indicates an intriguing prospect of graphene nanoflakes in designing novel spintronic devices, such as multistate magnetoresistance devices.
机译：使用密度函数理论与非Quiribrium的功能方法相结合，研究了通过Z字形边缘三角形石墨烯分子与两种铁圆形啮合的旋转依赖性运输。 结果表明，由于中央石墨烯纳米蛋白的内在磁，可以实现装置的四个自旋配置。 通过计算电流电压特性，获得三态磁阻效应，其伴随着大的自旋滤波效率。 根据器件的自旋配置，探讨固有机制作为自旋分裂前沿分子轨道的不同偏移。 这项工作表明了石墨烯纳米薄片在设计新型旋流器件中的诱人前景，例如多态磁阻器件。

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  • 来源
    《Journal of Materials Science》 |2019年第7期|共10页
  • 作者

    He Guangmeng; Qiu Shuai; Cui Yangjun; Yu Cuiju; Miao Yuanyuan; Zhang Guangping; Ren Junfeng; Wang Chuan-Kui; Hu Guichao;

  • 作者单位

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Shandong Prov Key Lab Med Phys &

    Image Proc Techn Jinan 250358 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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