Negligible spin–charge conversion in Bi films and Bi/Ag(Cu) bilayers
Source abstract
Abstract
Spin pumping experiments using ferromagnetic metals have reported highly efficient spin–charge conversion in Bi and at the Bi/Ag interface, possibly due to the inverse Rashba–Edelstein effect. However, longitudinal spin Seebeck effect experiments using the yttrium iron garnet ferrimagnetic insulator in Bi films and Bi/Ag bilayers do not show evidence of appreciable spin-to-charge conversion except the large Nernst signal inherent to Bi. These contrasting conclusions highlight the differences between magnetic metals and magnetic insulators as spin current injectors. Only the detected voltages that adhere to the inverse spin Hall effect of jC = (2e/ℏ)θSHjS×σ are due to spin currents.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Physics of Superconductivity and Magnetism · Magnetic properties of thin films · Quantum and electron transport phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics and Astronomy, Johns Hopkins University 1 , Baltimore, Maryland 21218, USA
State Key Laboratory of Surface Physics and Department of Physics, Fudan University 2 , Shanghai 200433, China
Funding
U.S. Department of Energy · National Science Foundation · National Nature Science Foundation of China
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