There is a growing interest in utilizing the distinctive material properties of organic semiconductors for spintronic applications. Here, we explore the injection of pure spin current from Permalloy into a small molecule system based on dinaphtho[2,3-b:2,3-f]thieno[3,2-b]thiophene (DNTT) at ferromagnetic resonance. The unique tunability of organic materials by molecular design allows us to study the impact of interfacial properties on the spin injection efficiency systematically. We show that both the spin injection efficiency at the interface and the spin diffusion length can be tuned sensitively by the interfacial molecular structure and side chain substitution of the molecule.

中文翻译：

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通过分子设计调整铁磁体-非磁体界面上的自旋电流注入。

在自旋电子学应用中利用有机半导体的独特材料特性引起了越来越多的兴趣。在这里，我们探索在铁磁共振下，从坡莫合金将纯自旋电流注入到基于萘并[2,3-b：2,3-f]噻吩并[3,2-b]噻吩（DNTT）的小分子系统中。通过分子设计有机材料的独特可调性，使我们能够系统地研究界面性质对自旋注入效率的影响。我们表明界面上的自旋注入效率和自旋扩散长度都可以通过界面分子结构和分子的侧链取代进行灵敏地调节。