Zhang Zhengzhong, Yin Fan, Wang Chao, Li Zhongwen, Liu Hao
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, People's Republic of China.
J Phys Condens Matter. 2021 May 12;33(23). doi: 10.1088/1361-648X/abf385.
Control of the charge, spin, and heat currents in thermoelectric devices is an interesting research field that is currently experiencing a burst of activity. In this work, a new type of spin-current generator is proposed that consists of a single-molecule magnet sandwiched between a pair of nonmagnetic electrodes. By applying an external magnetic field, this tunneling junction can generate a 100% spin-polarized current via thermoelectric effects, and the flow direction and spin polarization can be changed by adjusting the gate voltage or magnetic field. Moreover, regardless of whether the external magnetic field exists, the thermoelectric current is always highly spin polarized and can be switched by using different gate voltage windows. This molecular electrical device can be realized with current technologies and may have practical use in spin caloritronics and quantum information processing.
控制热电设备中的电荷、自旋和热电流是一个有趣的研究领域，目前正经历着一股研究热潮。在这项工作中，提出了一种新型的自旋电流发生器，它由夹在一对非磁性电极之间的单分子磁体组成。通过施加外部磁场，这种隧道结可以通过热电效应产生100%自旋极化电流，并且通过调节栅极电压或磁场可以改变电流方向和自旋极化。此外，无论外部磁场是否存在，热电流总是高度自旋极化的，并且可以通过使用不同的栅极电压窗口进行切换。这种分子电子器件可以用当前技术实现，并且可能在自旋热电子学和量子信息处理中有实际应用。
