通过带通能量滤波增强热自旋转移矩
Enhancement of Thermal Spin Transfer Torque via Bandpass Energy Filtering
AI总结：
本文提出在磁性隧道结中引入带通能量滤波和抗反射涂层光学类比设计，利用非平衡格林函数方法将热自旋转移矩增强近五倍，为低能耗磁化翻转和自旋电子学应用开辟新途径。
摘要：
我们提出在磁性隧道结器件中使用能量带通滤波方法，作为增强热自旋转移矩的一种途径。利用自旋分辨的非平衡格林函数形式，我们在异质结构磁性隧道结器件中利用了抗反射涂层的光学类比，该器件在线性温度偏置区域中报告了巨大的自旋矩。特别是，我们讨论了透射函数相对于费米能量的位置，该位置提供了最大的热效应。抗反射配置的箱车形透射特征与普通超晶格配置相比，增强了通过结构的电荷和自旋输运。通过我们的器件设计，热激发的自旋转移矩增强了几乎五倍。尽管热驱动的自旋矩比电势驱动的矩小得多，但该技术提供了一种节能的磁化翻转方式。这为自旋电子学应用开辟了一个新的可行领域。借助现有的先进薄膜生长技术，可以实现优化的超晶格配置。
英文摘要：
We propose the use of energy bandpass filtering approach in the magnetic tunnel junction device as a route to enhance the thermal spin transfer torque. Using the spin-resolved non-equilibrium Green's function formalism, we harness the optical analog of anti-reflective coating in a heterostructure MTJ device, that reports a huge spin torque in the linear regime of temperature bias. In particular, we discuss the position of transmission function with respect to the Fermi energy that caters the maximum thermal effect. The boxcar transmission feature of anti-reflective configuration enhances the charge and spin transport through the structure in comparison to the normal superlattice configurations. The thermally excited spin transfer torque is enhanced by almost five times more with our device design. Although, the thermally driven spin torque is much smaller than the potential driven torque, this technique provides an energy-efficient way to switch the magnetization. This opens up a new viable area in the spintronics applications. With the existing advanced thin-film growth technology, the optimized superlattice configurations can be achieved.
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。
