| 扰动对有机磁体器件自旋极化输运特性的影响 |
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| 引用本文： | 王辉,胡贵超,任俊峰.扰动对有机磁体器件自旋极化输运特性的影响[J].物理学报,2011,60(12):127201-127201. |
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| 作者姓名： | 王辉 胡贵超 任俊峰 |
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| 作者单位： | 山东师范大学物理与电子科学学院,济南 250014 |
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| 基金项目： | 国家自然科学基金 (批准号:10904084, 10904083)、山东省优秀中青年科学家科研奖励基金(批准号:2009BS01009)和山东省高等学校科技奖励计划(批准号:J09LA03)资助的课题. |
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| 摘 要： | 基于紧束缚模型和格林函数方法,研究了有机磁体晶格扰动和侧基自旋取向扰动对金属/有机磁体/金属三明治结构有机自旋器件自旋极化输运特性的影响.计算结果表明:晶格扰动的存在降低了器件的起始偏压,减小了导通电流,并使得电流-电压曲线的量子台阶效应不再显著,扰动不太强时电流仍呈现较高的自旋极化率;而侧基自旋取向扰动减小了体系的自旋劈裂,增加了器件的起始偏压,低偏压下随着扰动的增强器件电流及其自旋极化率明显降低.进一步模拟了温度对器件自旋极化输运的影响.
关键词：
有机自旋电子学
有机磁体
自旋极化输运
自旋过滤
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| 关 键 词： | 有机自旋电子学 有机磁体 自旋极化输运 自旋过滤 |
| 收稿时间： | 2011-01-26 |
| 修稿时间： | 8/2/2011 12:00:00 AM |
Effect of disturbance on spin polarized transport through an organic ferromagnetic device |
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| Wang Hui,Hu Gui-Chao and Ren Jun-Feng.Effect of disturbance on spin polarized transport through an organic ferromagnetic device[J].Acta Physica Sinica,2011,60(12):127201-127201. |
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| Authors: | Wang Hui Hu Gui-Chao and Ren Jun-Feng |
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| Institution: | College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;College of Physics and Electronics, Shandong Normal University, Jinan 250014, China |
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| Abstract: | Based on the tight-binding model and the Green's function method,the effects of atomic disorder of lattice configuration and the orientation disorder of side radical spins on the spin polarized transport through a metal/organic-ferromagnet/metal structure are investigated.The results show that the atomic disorder reduces the threshold voltage of the device and suppresses the conducting current.The staircase structure of the current-voltage curve for a molecular device is eliminated when the disorder is enha... |
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| Keywords: | orangic spintronics organic ferromagnet spin polarized transport spin filtering |
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