What is it about?
In this study, we investigate spin-to-charge conversion on a trilayer composed of Cobalt (Co), Antimony (Sb), and Permalloy (NiFe) using the spin-pumping (SP) technique. Our findings unequivocally demonstrate that the predominant process governing spin-to-charge conversion in the Sb layer is the Inverse Rashba-Edelstein effect (IREE), also, the SP signal remains near constant. This effect arises from the presence of surface states at both interfaces between the Co/Sb and Py/Sb layers. To provide context, we also present a comparison with the well-established spin-to-charge conversion observed in a Platinum (Pt) layer.
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Why is it important?
Spin-to-charge conversion stands as a pivotal phenomenon in the rapidly advancing field of spintronics, poised to reshape modern technology. This study contributes to a deeper comprehension of spin-to-charge conversion driven by surface states within an Antimony film. The insights gained have the potential to inspire the development of novel, energy-efficient spintronics devices.
Perspectives
The discovery of surface states in antimony films through spin current injection not only solidifies our understanding of quantum materials, but also opens new perspectives in spin orbitronics and condensed matter physics. Certainly, this discovery places Sb on the same level as topological materials, making it promising for study spin-momentum locking phenomena.
Antonio Azevedo
Universidade Federal de Pernambuco
Read the Original
This page is a summary of: Surface-state mediated spin-to-charge conversion in Sb films via bilateral spin current injection, Applied Physics Letters, November 2023, American Institute of Physics,
DOI: 10.1063/5.0169242.
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