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arXiv 2408.07412cond-mat.mes-hallcond-mat.mtrl-sci
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与高迁移率 Ge 二维空穴气接触的横向 Mn5Ge3 自旋阀

Lateral Mn5Ge3 spin-valve in contact with a high-mobility Ge two-dimensional hole gas

David Weißhaupt, Christoph Sürgers, Dominik Bloos, Hannes Simon Funk, Michael Oehme, Gerda Fischer, Markus Andreas Schubert, Christian Wenger, Joris van Slagere… 展开作者

David Weißhaupt, Christoph Sürgers, Dominik Bloos, Hannes Simon Funk, Michael Oehme, Gerda Fischer, Markus Andreas Schubert, Christian Wenger, Joris van Slageren, Inga Anita Fischer, Jörg Schulze

AI总结:

本文制备了间距约130 nm的横向 Mn5Ge3/Ge 2DHG/Mn5Ge3 自旋阀器件,并在13 K以下观测到可能源于自旋注入的磁阻信号,推动了兼容 CMOS 的二维空穴气自旋电子器件发展。

摘要:

应变量子阱中的 Ge 二维空穴气具有优异的自旋输运性质和理论上高效自旋操控的可能性,是未来自旋电子学应用的理想材料平台。随着外延生长工艺的持续发展,已可实现极高的空穴迁移率和较低的有效质量,从而有望实现高效自旋输运。此外,Ge 二维空穴气(2DHG)还可集成到成熟的工业互补金属氧化物半导体(CMOS)器件工艺中。然而,实现自旋电子器件的前提——向 Ge 2DHG 中高效电学注入自旋——尚未得到实验证实。本工作报道了横向结构 Mn5Ge3/Ge 2DHG/Mn5Ge3 器件的制备及其低温磁阻测量。铁磁性 Mn5Ge3 接触电极通过互扩散工艺直接生长在 Ge 量子阱内,电极间距约为 130 nm。在温度低于 13 K 时观测到磁阻信号,该信号可能源于成功的自旋注入。本结果向实现基于 2DHG 且兼容 CMOS 工艺的自旋电子器件迈出了重要一步。

英文摘要:

Ge two-dimensional hole gases in strained modulation-doped quantum-wells represent a promising material platform for future spintronic applications due to their excellent spin transport properties and the theoretical possibility of efficient spin manipulation. Due to the continuous development of epitaxial growth recipes extreme high hole mobilities and low effective masses can be achieved, promising an efficient spin transport. Furthermore, the Ge two-dimensional hole gas (2DHG) can be integrated in the well-established industrial complementary metal-oxide-semiconductor (CMOS) devices technology. However, efficient electrical spin injection into a Ge 2DHG - a prerequisite for the realization of spintronic devices - has not yet been demonstrated. In this work, we report the fabrication and low-temperature magnetoresistance measurements of a laterally structured Mn5Ge3/Ge 2DHG/ Mn5Ge3 device. The ferromagnetic Mn5Ge3 contacts are grown directly into the Ge quantum well by means of an interdiffusion process with a spacing of approximately 130 nm. We observe a magnetoresistance signal for temperatures below 13 K possibly arising from successful spin injection. The results represent a step forward toward the realization of CMOS compatible spintronic devices based on a 2DHG.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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