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Charge-spin conversion in layered semimetal TaTe2 and spin injection in van der Waals heterostructures

Anamul Md. Hoque, Dmitrii Khokhriakov, Bogdan Karpiak, and Saroj P. Dash*

  • Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296, Göteborg, Sweden

  • *Corresponding author: saroj.dash@chalmers.se
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Phys. Rev. Research 2, 033204 – Published 6 August, 2020

DOI: https://doi.org/10.1103/PhysRevResearch.2.033204

Abstract

A spin-polarized current source using nonmagnetic layered materials is promising for next-generation all-electrical spintronic science and technology. Here we electrically created spin polarization in a layered semimetal TaTe2 via the charge-spin conversion process. Using a hybrid device of TaTe2 in a van der Waals heterostructure with graphene, the spin polarization in TaTe2 is efficiently injected and detected by nonlocal spin-switch, Hanle spin precession, and inverse spin Hall effect measurements. Systematic experiments at different bias currents and gate voltages in a vertical geometry prove the TaTe2 as a nonmagnetic spin source at room temperature. These findings demonstrate the possibility of making an all-electrical spintronic device in a two-dimensional van der Waals heterostructure, which can be essential building blocks in energy-efficient spin-orbit technology.

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Phys. Rev. Research 2, 033204– Published 6 August, 2020
  • Received 5 December 2019
  • Accepted 17 June 2020
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by Bibsam.

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