Unambiguous Electrical Detection of Spin-Charge Conversion in Lateral Spin-Valves
arXiv:1906.10448 · doi:10.1103/PhysRevLett.124.236803
Abstract
Efficient detection of spin-charge conversion is crucial for advancing our understanding of emergent phenomena in spin-orbit-coupled nanostructures. Here, we provide proof of principle of an electrical detection scheme of spin-charge conversion that enables full disentanglement of competing spin-orbit coupling transport phenomena in diffusive lateral channels i.e. the inverse spin Hall effect (ISHE) and the spin galvanic effect (SGE). A suitable detection geometry in an applied oblique magnetic field is shown to provide direct access to spin-charge transport coefficients through a simple symmetry analysis of the output non-local resistance. The scheme is robust against tilting of the spin-injector magnetization, disorder and spurious non-spin related contributions to the non-local signal, and can be used to probe spin-charge conversion effects in both spin-valve and hybrid optospintronic devices.
6 pages, 2 figures + supplementary information (2 pages, 3 figures). Improved theory accounting for a much wider class of lateral spin-valve devices. Readability has been improved to make work accessible to wider audience. Title, abstract, main text, references and SM updated accordingly
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