Jiang Yue, Guo Yan-Dong, Lin Li-Yan, Yan Xiao-Hong
College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China.
College of Science, Jinling Institute of Technology, Nanjing 211169, China.
Nanoscale. 2022 Jul 21;14(28):10033-10040. doi: 10.1039/d2nr02175g.
The generation of spin currents is a significant issue in spintronics. A spin current can be induced by a temperature gradient in the spin-dependent Seebeck effect, which has attracted growing interest over recent years. Herein we propose spin caloritronic devices based on magnetic graphether nanoribbons and investigate the spin thermoelectric properties by first-principles calculations. Owing to the symmetrical spin-resolved transmission spectra, our devices exhibit a robust spin-dependent Seebeck effect and could generate a pure spin current. Moreover, they manifest a high spin Seebeck coefficient and a giant spin figure of merit. Our findings demonstrate that graphether-nanoribbon-based devices possess remarkable spin thermoelectric performance, and might be promising candidates for spin caloritronics.
自旋电流的产生是自旋电子学中的一个重要问题。在自旋相关的塞贝克效应中，温度梯度可以诱导产生自旋电流，近年来这一效应已引起越来越多的关注。在此，我们提出了基于磁性石墨烯纳米带的自旋热电器件，并通过第一性原理计算研究其自旋热电性质。由于自旋分辨传输谱的对称性，我们的器件表现出稳健的自旋相关塞贝克效应，并且能够产生纯自旋电流。此外，它们还表现出高自旋塞贝克系数和巨大的自旋优值。我们的研究结果表明，基于石墨烯纳米带的器件具有卓越的自旋热电性能，可能是自旋热电子学的有前途的候选者。
