Spin-dependent transport and magnetism in spin filter/silicon heterostructures

在这个项目中，我们提出了建立自旋过滤器隧道接触技术上最相关的半导体，硅的第一个研究。近年来，在利用电子自旋自由度进行新的应用的前景的推动下，自旋电子学领域取得了迅速的进展。对于有效的自旋注入和自旋检测，已经设想了许多概念，例如基于磁性随机存取存储器单元架构的专用铁磁体-绝缘体接触。然而，仍然缺少的是自旋电子注入器/检测器材料，具有高自旋极化和电导匹配的能力，并与硅外延集成。我们的项目旨在弥合这一差距，展示“直接在硅上生长的高自旋选择性、磁性匹配的磁性半导体隧道接触中的自旋过滤器功能。我们期望，我们提出的工作将开辟一个令人兴奋的类别的铁磁材料的自旋注入和检测半导体和磁性半导体/硅异质结构的磁性，界面控制和自旋输运提供了一个基本的理解。

In this project, we propose the first studies of establishing spin filter tunnel contacts to the technologically most relevant semiconductor, silicon. In recent years, the field of spintronics has progressed rapidly, driven by the perspective to utilize the electron s spin degree of freedom for new applications. Numerous concepts have been envisioned for efficient spin injection and -detection, such as dedicated ferromagnet-insulator contacts based on magnetic random access memory cell achitectures. Still missing, however, are spintronic injector/-detector materials with high spin polarization and the ability to be conductance matched and epitaxially integrated with silicon. Our project aims at bridging this gap, demonstrating „spin filter functionality in highly spin-selective, resistivity-matched magnetic semiconductor tunnel contacts grown directly on silicon. We expect, that our proposed work will open up an exciting category of ferromagnetic materials for spin injection and -detection in semiconductors and provide a fundamental understanding on magnetism, interface control and spin transport of magnetic semiconductor/silicon heterostructures.