协同自旋热电子器件
Cooperative Spin Caloritronic Devices
摘要：
本文提出了一种热电器件的概念--协同自旋热电子器件（CSCD），其中两个或多个能量通道（如自旋、电荷和热流）之间的协同作用可以显著提高自旋热电子器件的能量效率。我们推导出了CSCD的品质因数和最大效率的解析形式，由于合作效应。在具有多重耦合效应的自旋热电子系统中，协同效应显著提高了系统的品质因数和最大效率。几个例子的CSCD，包括电流和热电流诱导DW运动，自旋热电发电机和自旋热电冷却/加热，研究说明合作效应的有用性。我们比较了CSCD的效率与最近提出的几个自旋热电子器件。我们的方案为寻找未来自旋热电子器件的高性能材料和结构提供了一条新的途径。
英文摘要：
We report a concept of thermoelectric devices, cooperative spin caloritronics device (CSCD), where cooperation between two or more energy channels such as spin, charge and heat currents can significantly enhance energy efficiency of spin caloritronic devices. We derive the figure of merit and the maximum efficiency due to cooperative effect in analytic forms for a CSCD. Cooperative effects significantly improve the figure of merit and the maximum efficiency in spin caloritronic systems with multiply couplings effects. Several examples of CSCDs, including electrical and thermal current induced DW motion, spin-thermoelectric power generator and spin-thermoelectric cooling/heating, are studied to illustrate the usefulness of the cooperative effect. We compare the efficiency of CSCD with several recently proposed spin caloritronic devices. Our scheme provides a novel route to seek high performance materials and structures for future spin caloritronic devices.
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