Dynamic nuclear spin polarization induced by Edelstein effect at Bi(111) surfaces

Abstract

Nuclear spin polarization induced by hyperfine interaction and the Edelstein effect due to strong spin-orbit interaction is investigated by quantum transport in Bi(111) thin film samples. The Bi(111) films are deposited on mica by van der Waals epitaxial growth. The Bi(111) films show micrometer-sized triangular islands with 0.39 nm step height, corresponding to the Bi(111) bilayer height. At low temperatures a high current density is applied to generate a non-equilibrium carrier spin polarization by the Edelstein effect at the Bi(111) surface, which then induces dynamic nuclear polarization by hyperfine interaction. Comparative quantum magnetotransport antilocalization measurements indicate a suppression of antilocalization by the in-plane Overhauser field from the nuclear polarization and allow a quantification of the Overhauser field. Hence nuclear polarization was both achieved and quantified by a purely electronic transport-based approach.

arXiv comment5 pages, 6 figures, supplemental material

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Cited by in corpus (3)

• Exceptional electronic transport and quantum oscillations in thin bismuth crystals grown inside van der Waals materials
• Entropy Driven Inductive Response of Topological Insulators
• Spin-orbit torque on nuclear spins exerted by a spin accumulation via hyperfine interactions