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Updated: Jul 6, 2025
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
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Atomic-Layer Controlled Transition from Inverse Rashba-Edelstein Effect to Inverse Spin Hall Effect in 2D PtSe2
Khasan Abdukayumov1, Martin Mičica2, Fatima Ibrahim1
1CEA, CNRS, Université Grenoble Alpes, Grenoble INP, IRIG-Spintec, Grenoble, 38000, France.
Advanced Materials (Deerfield Beach, Fla.)
|December 30, 2023
Summary
Two-dimensional Platinum Diselenide (PtSe2) exhibits tunable spin-to-charge conversion (SCC) by controlling layer thickness. This study reveals a transition from inverse Rashba-Edelstein effect to inverse spin Hall effect in PtSe2, enabling THz spintronic device development.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Two-dimensional (2D) materials offer unique platforms for spin-to-charge conversion (SCC) due to strong spin-orbit coupling (SOC) and tunable electronic properties.
- Transition metal dichalcogenides (TMDs) are particularly promising for spintronic applications.
Purpose of the Study:
- To investigate SCC in epitaxially grown 2D Platinum Diselenide (PtSe2) using THz spintronic emission.
- To explore the influence of PtSe2 thickness on SCC mechanisms and device performance.
Main Methods:
- Epitaxial growth of high-quality 2D PtSe2 layers.
- In situ ferromagnet deposition via sputtering to create clean interfaces.
- THz spintronic emission measurements to probe SCC.
Main Results:
- Demonstrated high-quality PtSe2 layers with well-defined interfaces.
- Observed a thickness-dependent transition in SCC mechanisms: inverse Rashba-Edelstein effect (IREE) for 1-3 monolayers (ML) and inverse spin Hall effect (ISHE) for >3 ML.
- Quantified perpendicular spin diffusion length and relative strengths of IREE and ISHE.
Conclusions:
- PtSe2 exhibits tunable SCC, transitioning from IREE to ISHE with increasing layer thickness.
- The flexible band structure of PtSe2 makes it an excellent candidate for exploring SCC mechanisms.
- PtSe2 is a promising material for developing tunable THz spintronic emitters.
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