Gate-tunable giant superconducting nonreciprocal transport in few-layer $T_{\rm d}$-MoTe$_2$
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866929495202594816 |
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| author | Wakamura, T. Hashisaka, M. Hoshino, S. Bard, M. Okazaki, S. Sasagawa, T. Taniguchi, T. Watanabe, K. Muraki, K. Kumada, N. |
| author_facet | Wakamura, T. Hashisaka, M. Hoshino, S. Bard, M. Okazaki, S. Sasagawa, T. Taniguchi, T. Watanabe, K. Muraki, K. Kumada, N. |
| contents | We demonstrate gate-tunable giant field-dependent nonreciprocal transport (magnetochiral anisotropy) in a noncentrosymmetric superconductor $T_{\rm d}$-MoTe$_2$ in the thin limit. Giant magnetochiral anisotropy (MCA) with a rectification coefficient $γ$ = $3.1 \times 10^6$ T$^{-1}$ A$^{-1}$, is observed at 230 mK, below the superconducting transition temperature ($T_c$). This is one of the largest values reported so far and is likely attributed to the reduced symmetry of the crystal structure. The temperature dependence of $γ$ indicates that the ratchet-like motion of magnetic vortices is the origin of the MCA, as supported by our theoretical model. For bilayer $T_{\rm d}$-MoTe$_2$, we successfully perform gate control of the MCA and realize threefold modulation of $γ$. Our experimental results provide a new route to realizing electrically controllable superconducting rectification devices in a single material. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_09747 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gate-tunable giant superconducting nonreciprocal transport in few-layer $T_{\rm d}$-MoTe$_2$ Wakamura, T. Hashisaka, M. Hoshino, S. Bard, M. Okazaki, S. Sasagawa, T. Taniguchi, T. Watanabe, K. Muraki, K. Kumada, N. Mesoscale and Nanoscale Physics Superconductivity We demonstrate gate-tunable giant field-dependent nonreciprocal transport (magnetochiral anisotropy) in a noncentrosymmetric superconductor $T_{\rm d}$-MoTe$_2$ in the thin limit. Giant magnetochiral anisotropy (MCA) with a rectification coefficient $γ$ = $3.1 \times 10^6$ T$^{-1}$ A$^{-1}$, is observed at 230 mK, below the superconducting transition temperature ($T_c$). This is one of the largest values reported so far and is likely attributed to the reduced symmetry of the crystal structure. The temperature dependence of $γ$ indicates that the ratchet-like motion of magnetic vortices is the origin of the MCA, as supported by our theoretical model. For bilayer $T_{\rm d}$-MoTe$_2$, we successfully perform gate control of the MCA and realize threefold modulation of $γ$. Our experimental results provide a new route to realizing electrically controllable superconducting rectification devices in a single material. |
| title | Gate-tunable giant superconducting nonreciprocal transport in few-layer $T_{\rm d}$-MoTe$_2$ |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2303.09747 |