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4 October 2022 Light and microwave driven spin pumping across FeGaB–BiSb interface (Conference Presentation)
Matthias Benjamin Jungfleisch, Vinay Sharma, Weipeng Wu, Prabesh Bajracharya, Duy Quang To, Anthony Johnson, Anderson Janotti, Garnett W. Bryant, Lars Gundlach, Ramesh C. Budhani
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Proceedings Volume PC12205, Spintronics XV; PC1220502 (2022) https://doi.org/10.1117/12.2633843
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
Three-dimensional (3D) topological insulators (TI) with large spin Hall conductivity have emerged as potential candidates for spintronic applications. Here, we report spin to charge conversion in bilayers of amorphous ferromagnet Fe78Ga13B9 (FeGaB) and 3D TI Bi85Sb15 (BiSb) activated by two complementary techniques: spin pumping and ultrafast spin-current injection. The spin pumping parameters derived from inverse spin Hall effect (ISHE) measurements are consistent with the results of femtosecond light-pulse induced THz emission. These measurements are successfully verified using theoretical calculations of thickness-dependent spin Hall conductivity of BiSb thin films based on a tight-binding model.
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Matthias Benjamin Jungfleisch, Vinay Sharma, Weipeng Wu, Prabesh Bajracharya, Duy Quang To, Anthony Johnson, Anderson Janotti, Garnett W. Bryant, Lars Gundlach, and Ramesh C. Budhani "Light and microwave driven spin pumping across FeGaB–BiSb interface (Conference Presentation)", Proc. SPIE PC12205, Spintronics XV, PC1220502 (4 October 2022); https://doi.org/10.1117/12.2633843
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KEYWORDS
Interfaces
Microwave radiation
Data modeling
Scientific research
Spintronics
Terahertz radiation
Dielectrics
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