Spin and symmetry electronic properties of spintronics interfaces with Heusler compounds

该项目解决了与实现先进的纯Heusler为基础的室温自旋电子学设备的基本问题。重点将放在每一个这样的设备，即之间的异质结自旋注入器（SI）和自旋导体（SC）材料的基本构建块。SI/SC结构单元的具体功能将根据两个基本性质来表征：（i）SI-SC界面处的自旋注入效率;和（ii）SC本身中的自旋扩散长度。在实验上，数量（i）和（ii）将通过实施基于自旋和时间分辨双光子光电发射（STR-2 PPE）的既定实验策略来获得。它允许相关的自旋注入的效率与所考虑的接口的静态自旋相关的属性，以及明确区分所考虑的SI/SC异质结的接口和体自旋相关的属性。所提供的实验证据将允许确定最适合的SI/SC构建模块，用于开发未来先进自旋电子器件的基础。

This project addresses the fundamental issues connected to the realization of advanced pure Heusler-based room temperature spintronics devices. Focus will be put on the basic building block of every such device, namely the heterojunction between a spin injector (SI) and a spin conductor (SC) material. The specific functionality of SI/SC building blocks will be characterized in terms of two fundamental properties: (i) the spin-injection efficiency at the SI-SC interface; and (ii) the spin diffusion length in the SC itself. Experimentally, the quantities (i) and (ii) will be accessible by implementing an established experimental strategy based on the spin-and time-resolved two-photon photoemission (STR-2PPE). It allows to correlate the efficiency of spin-injection with the static spin-dependent properties of the considered interface as well as to distinguish unambiguously between interface and bulk spin-dependent properties of the considered SI/SC heterojunction. The provided experimental evidence will allow identifying the best suited SI/SC building blocks for developing the foundations of future advanced spintronics devices.