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Spin-valley thermoelectric characteristics of ferromagnetic silicene superlattice
Ain Shams Engineering Journal ( IF 6 ) Pub Date : 2021-01-22 , DOI: 10.1016/j.asej.2021.01.002
Mohammed M. El-Banna , Adel Helmy Phillips , Ahmed Saeed Abdelrazek Bayoumi

Based on the transfer matrix method valley-spin caloritronic transport properties of ferromagnetic silicene superlattice are investigated theoretically under ac-field effect of various frequencies. The purpose of this work is to describe resolved thermoelectric parameters such as (charge, spin and valley) Seebeck and Peltier coefficients and electronic thermal conductance, by photon-assisted tunneling probability bases. An oscillatory behavior is resulted for all investigated thermoelectric parameters in this investigation. These oscillations might be due to photon assisted tunneling. The improved values of charge, spin, valley power factors might be due to quantum confinement effect, which leads to enhancements of charge, spin, valley figure of merits as indicated from the obtained results. Also, results show that ferromagnetic silicene superlattice is good to use as energy harvesting thermoelectric nanodevice (Seebeck coefficient), and may be used as nanoelectronic devices cooler (Peltier coefficient). So, this present research shows that ferromagnetic silicene superlattice is good promising for flexible thermoelectric power generation.



中文翻译:

铁磁硅烯超晶格的自旋谷热电特性

基于传递矩阵法,在各种频率的交流场效应下,从理论上研究了铁磁硅烯超晶格的谷-自旋热电子输运特性。这项工作的目的是通过光子辅助隧穿概率基础来描述解析的热电参数,例如(电荷、自旋和谷值)塞贝克和珀尔帖系数以及电子热导。在本研究中,所有研究的热电参数都产生了振荡行为。这些振荡可能是由于光子辅助隧道效应。电荷、自旋、谷功率因数的改进值可能是由于量子限制效应导致电荷、自旋、谷品质因数的增强,如所获得的结果所示。还,结果表明,铁磁硅烯超晶格可以很好地用作能量收集热电纳米器件(塞贝克系数),并且可以用作纳米电子器件的冷却器(珀尔帖系数)。因此,目前的研究表明,铁磁硅烯超晶格在柔性热电发电方面具有良好的前景。

更新日期:2021-01-22
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