Spin diode behavior in transport through single-molecule magnets
Spin diode behavior in transport through single-molecule magnets
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DOI：
10.1209/0295-5075/89/18003
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发表时间：
2010-01-01
期刊：
影响因子：
1.8
通讯作者：
Barnas, J.
中科院分区：
文献类型：
--
作者：
Misiorny, M.;Weymann, I.;Barnas, J.
本文研究了单分子磁体与一个超导体和一个铁磁铅弱耦合系统的输运性质。在真实的时间使用图解技术，我们计算运输的顺序和cotunneling制度的铁磁和反铁磁交换耦合分子的LUMO水平和核心自旋之间。我们证明了电流。通过该系统，相对于偏置反转是不对称的，对于特定的偏置极化被强烈地抑制。因此，所考虑的系统提出了一个原型的SMM自旋二极管。此外，我们还表明，这样的设备的功能可以通过改变分子的LUMO能级的位置进行调谐，并强烈依赖于交换相互作用的类型。版权所有（C）EPLA，2010
We study transport properties of a single-molecule magnet (SMM) weakly coupled to one nonmagnetic and one ferromagnetic lead. Using the diagrammatic technique in real time, we calculate transport in the sequential and cotunneling regimes for both ferromagnetic and antiferromagnetic exchange coupling between the molecule's LUMO level and the core spin. We show that the current. owing through the system is asymmetric with respect to the bias reversal, being strongly suppressed for particular bias polarizations. Thus, the considered system presents a prototype of a SMM spin diode. In addition, we also show that the functionality of such a device can be tuned by changing the position of the molecule's LUMO level and strongly depends on the type of exchange interaction. Copyright (C) EPLA, 2010