Interfacial Spin-to-Charge Conversion in Sputtered MoTe2 Heterostructures Probed by Spin Pumping and Spin-Torque Ferromagnetic Resonance
Abstract
Transition metal dichalcogenides (TMDs) and their Weyl semimetal phases, such as MoTe2, have attracted significant attention for spin-orbit torque applications due to their efficient charge-to-spin conversion. However, whether this conversion originates predominantly from the bulk or the interface remains unclear. Here, we investigate spin-charge interconversion in MoTe2 using spin-pumping and spin-torque ferromagnetic resonance (SP-FMR and ST-FMR). Thickness-dependent measurements reveal large spin-to-charge conversion and spin-torque efficiencies that are essentially independent of MoTe2 thickness, indicating that the conversion is predominantly governed by the Rashba-Edelstein effect at the Py/MoTe2 interface rather than by bulk spin transport. This behavior contrasts with the characteristic thickness dependence observed in Pt heterostructures and is further supported by bidirectional SP-FMR and interface-separation measurements. Our results highlight the dominant role of the Py/MoTe2 interface in enabling efficient spin-charge conversion and spin-orbit torques in TMD-based spintronic devices. These findings highlight the potential of sputtered MoTe2/Py heterostructures for low-power spintronic applications, including magnetic memory and logic devices.
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BibTeX
@misc{costa2026interfacial,
title = {{Interfacial Spin-to-Charge Conversion in Sputtered MoTe2 Heterostructures Probed by Spin Pumping and Spin-Torque Ferromagnetic Resonance}},
author = {J. L. Costa and E. Santos and E. L. T. França and J. B. S. Mendes and A. Azevedo},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.30953},
eprint = {2608.30953},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.30953},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Interfacial Spin-to-Charge Conversion in Sputtered MoTe2 Heterostructures Probed by Spin Pumping and Spin-Torque Ferromagnetic Resonance
AU - J. L. Costa
AU - E. Santos
AU - E. L. T. França
AU - J. B. S. Mendes
AU - A. Azevedo
PY - 2026
DA - 2026/08/31
PB - arXiv
DO - 10.48550/arxiv.2608.30953
UR - https://arxiv.org/abs/2608.30953
AB - Transition metal dichalcogenides (TMDs) and their Weyl semimetal phases, such as MoTe_2, have attracted significant attention for spin-orbit torque applications due to their efficient charge-to-spin conversion. However, whether this conversion originates predominantly from the bulk or the interface remains unclear. Here, we investigate spin-charge interconversion in MoTe_2 using spin-pumping and spin-torque ferromagnetic resonance (SP-FMR and ST-FMR). Thickness-dependent measurements reveal large spin-to-charge conversion and spin-torque efficiencies that are essentially independent of MoTe_2 thickness, indicating that the conversion is predominantly governed by the Rashba-Edelstein effect at the Py/MoTe_2 interface rather than by bulk spin transport. This behavior contrasts with the characteristic thickness dependence observed in Pt heterostructures and is further supported by bidirectional SP-FMR and interface-separation measurements. Our results highlight the dominant role of the Py/MoTe_2 interface in enabling efficient spin-charge conversion and spin-orbit torques in TMD-based spintronic devices. These findings highlight the potential of sputtered MoTe_2/Py heterostructures for low-power spintronic applications, including magnetic memory and logic devices.
ER -