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- W2048285536 abstract "The spin injection technique is extended to semimetal bismuth samples in a lateral spin valve geometry. We study spin injection, diffusion, and detection in a material system where a small change in sample stoichiometry results in a large change in the electronic and spin dependent transport properties of the nonmagnetic material. Measurements of magnetoresistance, using a magnetic field applied in the sample plane, as well as the Hanle effect, using a field applied perpendicular to the sample plane, are reported. We demonstrate two remarkable results: (i) a spin diffusion length of $230text{ }ensuremath{mu}text{m}$ $(T=2text{ }text{K})$ in a BiPb sample with temperature dependent resistivity, $ensuremath{rho}(T)$, which decreases with decreasing $T$ is the longest known value in a thin film; (ii) the interfacial spin polarization is 10% in BiPb samples with decreasing $ensuremath{rho}(T)$ and an order of magnitude smaller (0.8%) in Bi samples where $ensuremath{rho}(T)$ increases with decreasing $T$." @default.
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- W2048285536 date "2009-05-01" @default.
- W2048285536 modified "2023-09-27" @default.
- W2048285536 title "Electrical spin injection and detection in semimetallic Bi and Bi-Pb films" @default.
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- W2048285536 doi "https://doi.org/10.1103/physrevb.79.195201" @default.
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