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PreprintCC BY 4.0arXiv

Spin Relaxation and Electrical Control of Spin Transport in Few-Layer Td-MoTe2

  • T. Wakamura
  • M. Hashisaka
  • M. Bard
  • S. Okazaki
  • T. Sasagawa
  • T. Taniguchi
  • K. Watanabe
  • K. Muraki
  • N. Kumada
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Abstract

We report electrical tuning of spin relaxation in atomically thin Td-MoTe2, a representative low-symmetry transition metal dichalcogenide. Weak antilocalization measurements reveal strong spin--orbit interaction with spin--orbit lengths of tens of nanometers, consistent with recent theoretical predictions. Despite the semimetallic nature of Td-MoTe2, in the ultrathin limit the spin--orbit scattering time can be tuned electrostatically by up to threefold. We further investigate vertical electric field effects on the spin--orbit length and time, and demonstrate the modulation of the Rashba parameters. Relation between spin--orbit scattering time and the diffusion coefficient indicates that spin relaxation is governed by the D'yakonov--Perel' mechanism in both monolayer and bilayer Td-MoTe2. These results establish few-layer Td-MoTe2 as a platform for electrically tunable spin transport, thereby providing insight into spin relaxation in low-symmetry transition metal dichalcogenides.

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Cite

BibTeXRIS
BibTeX
@misc{wakamura2026spin,
  title = {{Spin Relaxation and Electrical Control of Spin Transport in Few-Layer $T_\rm d$-MoTe$_2$}},
  author = {T. Wakamura and M. Hashisaka and M. Bard and S. Okazaki and T. Sasagawa and T. Taniguchi and K. Watanabe and K. Muraki and N. Kumada},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.36399},
  eprint = {2610.36399},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.36399},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Spin Relaxation and Electrical Control of Spin Transport in Few-Layer T_d-MoTe_2
AU  - T. Wakamura
AU  - M. Hashisaka
AU  - M. Bard
AU  - S. Okazaki
AU  - T. Sasagawa
AU  - T. Taniguchi
AU  - K. Watanabe
AU  - K. Muraki
AU  - N. Kumada
PY  - 2026
DA  - 2026/10/26
PB  - arXiv
DO  - 10.48550/arxiv.2610.36399
UR  - https://arxiv.org/abs/2610.36399
AB  - We report electrical tuning of spin relaxation in atomically thin T_d-MoTe_2, a representative low-symmetry transition metal dichalcogenide. Weak antilocalization measurements reveal strong spin--orbit interaction with spin--orbit lengths of tens of nanometers, consistent with recent theoretical predictions. Despite the semimetallic nature of T_d-MoTe_2, in the ultrathin limit the spin--orbit scattering time can be tuned electrostatically by up to threefold. We further investigate vertical electric field effects on the spin--orbit length and time, and demonstrate the modulation of the Rashba parameters. Relation between spin--orbit scattering time and the diffusion coefficient indicates that spin relaxation is governed by the D'yakonov--Perel' mechanism in both monolayer and bilayer T_d-MoTe_2. These results establish few-layer T_d-MoTe_2 as a platform for electrically tunable spin transport, thereby providing insight into spin relaxation in low-symmetry transition metal dichalcogenides.
ER  -