Theory of spin caloric transport / spin caloritronics

通过理论物理的方法，我们将帮助理解自旋，电荷和热输运耦合到由金属，半导体和绝缘体组成的混合磁性纳米结构中的磁化动力学。我们对磁性绝缘体（如钇铁石榴石）中的自旋电流的研究可能使未来的技术成为可能，例如，低耗散和低串扰的基于自旋的互连、无电磁干扰的通信路径和具有增益的自旋晶体管。基于绝缘体的热电发动机可能会变得上级，因为它们不受导热率和导电率之间的比例限制。 这些现象的新物理被认为是由自旋转移力矩和自旋泵通过在携带自旋积累的正常金属和磁体之间的界面处的交换相互作用引起的。我们将研究在这种界面上自旋波的产生和探测的非平衡热力学，并建立一个混合金属和绝缘体磁电子学的综合输运理论。在与其他小组的合作中，更好的理解将开辟途径，以工程师的自旋波耦合到外部（热）电路，并评估基于自旋波的纳米电子学的潜力。 与此密切相关的和实验相关的主题也要研究的是磁性绝缘体（分层结构）中磁化动力学的阻尼，热流诱导的磁化织构运动以及热自旋和异常霍尔效应家族

By the methods of theoretical physics we will help understand spin, charge, and heat transport coupled to the magnetization dynamics in hybrid magnetic nanostructures consisting of metals, semiconductors and insulators. Our studies of spin currents in magnetic insulators such as Yttrium-Iron-Garnets may enable future technologies for, e.g., low-dissipation and low-crosstalk spin-based interconnects, electro-magnetic interference-less communication pathways, and spin transistors with gain. Thermoelectric engines based on insulators may become superior since they are no limited by the proportionality between thermal and electrical conductivities. The new physics of these phenomena is believed to be caused by the spin-transfer torque and spin pumping via the exchange interaction at the interface between a normal metal carrying a spin accumulation and a magnet. We will investigate the non-equilibrium thermodynamics of the generation and detection of spin waves at such interfaces and set up an integrated transport theory for a hybrid metallic and insulator magnetoelectronics. In collaboration with other groups the better understanding will open pathways to engineer the coupling of the spin waves to external (thermo)electric circuits and assess the potential of a spin-wave based nanoelectronics. Closely related and experimentally relevant topics to be also studied are the damping of magnetization dynamics in (layered structures with) magnetic insulators, heat-current-induced motion of magnetization textures and the thermal spin and anomalous Hall effect family