We have investigated direct and inverse Edelstein effects in a one-atom-layer Tl-Pb compound with a large Rashba-type spin splitting. In spin pumping experiments at room temperature, spin-to-charge conversion voltage due to the inverse Edelstein effect is clearly observed in Py/Cu/Tl-Pb trilayer samples. To confirm efficient spin-charge interconversion in Tl-Pb compounds, the direct Edelstein effect is also studied in the same trilayer samples by measuring the modulation of the effective magnetization damping in the Py layer via the charge-to-spin conversion in the Tl-Pb layer. Using the results of both direct and inverse Edelstein effects, the Edelstein length is estimated to be ∼0.1 nm for Tl-Pb compounds.
Efficient Edelstein effects in one-atom-layer Tl-Pb compound
Present address: Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan and RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
Y. Shiomi, K. T. Yamamoto, R. Nakanishi, T. Nakamura, S. Ichinokura, R. Akiyama, S. Hasegawa, E. Saitoh; Efficient Edelstein effects in one-atom-layer Tl-Pb compound. Appl. Phys. Lett. 30 July 2018; 113 (5): 052401. https://doi.org/10.1063/1.5040546
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