论文标题
溅射BI $ _x $ se $ _ {1-x} $中的全电动旋转转换转换
All-electrical spin-to-charge conversion in sputtered Bi$_x$Se$_{1-x}$
论文作者
论文摘要
实现自旋设备（例如中逻辑设备）的主要障碍之一是用于磁化读数的小信号幅度，这使得找到具有高旋转电荷转换效率的材料很重要。尽管在两种材料的连接处进行混太联是一种广泛发生的现象，但它对材料表征的影响和旋转转换效率的估计很容易被忽略或低估。在这里，我们演示了BI $ _x $ SE $ _ {1-X} $ NANODEVICES中的所有电旋转电荷转换，并显示如何通过数十次高估转换效率，这取决于用作接触的相邻金属。我们将其归因于混合诱导的组成变化以及多晶的特性，从而导致电阻率和旋转霍尔角的急剧变化。讨论了改善功能设备相似结构中旋转电荷转换信号的策略。
One of the major obstacles to realizing spintronic devices such as MESO logic devices is the small signal magnitude used for magnetization readout, making it important to find materials with high spin-to-charge conversion efficiency. Although intermixing at the junction of two materials is a widely occurring phenomenon, its influence on material characterization and the estimation of spin-to-charge conversion efficiencies is easily neglected or underestimated. Here, we demonstrate all electrical spin-to-charge conversion in Bi$_x$Se$_{1-x}$ nanodevices and show how the conversion efficiency can be overestimated by tens of times depending on the adjacent metal used as a contact. We attribute this to the intermixing-induced compositional change and the properties of a polycrystal that lead to drastic changes in resistivity and spin Hall angle. Strategies to improve the spin-to-charge conversion signal in similar structures for functional devices are discussed.
