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arXiv 1603.07652cond-mat.mes-hall
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分子结中耦合自旋对的电压诱导开关动力学

Voltage induced switching dynamics of a coupled spin pair in a molecular junction

T. Saygun, J. Bylin, H. Hammar, J. Fransson

摘要:

分子自旋电子学是通过分子的电子组态和磁极化之间的耦合而实现的。为了控制和应用单个分子的状态,有必要读取和写入它们的自旋状态。传统上,这是通过外部磁场或铁磁接触来实现的,这可能改变有意的自旋状态,并且在缩小器件尺寸时可能带来额外的挑战。在这里,我们预测,耦合磁性分子在一起开辟了所有的电子控制的分子自旋状态,以及通过系统的电流的可能性。在铁磁和反铁磁交换相互作用的机制之间调谐,电流可以至少增加或减少一个数量级。该效应对隧道耦合和分子水平排列敏感,其可用于实现电流整流。

英文摘要:

Molecular spintronics is made possible by the coupling between electronic configuration and magnetic po- larization of the molecules. For control and application of the individual molecular states it is necessary to both read and write their spin states. Conventionally, this is achieved by means of external magnetic fields or ferromagnetic contacts, which may change the intentional spin state and may present additional challenges when downsizing devices. Here, we predict that coupling magnetic molecules together opens up possibilities for all electrical control of both the molecular spin states as well as the current flow through the system. Tuning between the regimes of ferromagnetic and anti-ferromagnetic exchange interaction, the current can be, at least, an order of magnitude enhanced or reduced. The effect is susceptible to the tunnel coupling and molecular level alignment which can be used to achieve current rectification.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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