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| Formato: | Preprint |
| Publicado: |
2021
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| Acceso en línea: | https://arxiv.org/abs/2112.10266 |
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| _version_ | 1866929255209762816 |
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| author | Wu, Chen-Huan Ren, Yujie |
| author_facet | Wu, Chen-Huan Ren, Yujie |
| contents | We investigate ferroelectric polariation as well as the formation of long-range order and the carrier density distribution in type-II Weyl semimetal WTe$_{2}$ in $T_{d}$ phase.
It is been found that the metallicity and ferroelectricity can coexist in bulk WTe$_{2}$ which has a significant impact on the electrical transport\cite{Sharma}, despite its large conductance. Also, our theoretical calculation and numerical simulation provide a deeper insight to the electrical structure-dependent dynamics of WTe$_{2}$. Base on the two-level approximation verify that the polarization stems from uncompensated out-of-plane interband transition of the electrons, which is base on the calculations of the dipole transition moment (in both the momentum space and frequency domain), and we found that the topological character of type-II Weyl system is closely related to the electronic behaviors (like the carrier compensation) and the excitations near the Weyl cone. The anisotropy and the topologically protected spin-polarized bulk (Weyl orbit) and surface states in WTe$_{2}$ induce hysteresis, which exhibitspotential in applications of non-volatile energy-efficient data-storage devices. Part of the properties of WTe$_{2}$ are also shares shared by the thermoelectric properties with other two-dimensional transition-metal dichalcogenides, like the WSe$_{2}$ and MoTe$_{2}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2112_10266 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Ferroelectricity and related effects on carrier transport in type-II Weyl semimetal WTe$_{2}$ thin film Wu, Chen-Huan Ren, Yujie Statistical Mechanics Materials Science We investigate ferroelectric polariation as well as the formation of long-range order and the carrier density distribution in type-II Weyl semimetal WTe$_{2}$ in $T_{d}$ phase. It is been found that the metallicity and ferroelectricity can coexist in bulk WTe$_{2}$ which has a significant impact on the electrical transport\cite{Sharma}, despite its large conductance. Also, our theoretical calculation and numerical simulation provide a deeper insight to the electrical structure-dependent dynamics of WTe$_{2}$. Base on the two-level approximation verify that the polarization stems from uncompensated out-of-plane interband transition of the electrons, which is base on the calculations of the dipole transition moment (in both the momentum space and frequency domain), and we found that the topological character of type-II Weyl system is closely related to the electronic behaviors (like the carrier compensation) and the excitations near the Weyl cone. The anisotropy and the topologically protected spin-polarized bulk (Weyl orbit) and surface states in WTe$_{2}$ induce hysteresis, which exhibitspotential in applications of non-volatile energy-efficient data-storage devices. Part of the properties of WTe$_{2}$ are also shares shared by the thermoelectric properties with other two-dimensional transition-metal dichalcogenides, like the WSe$_{2}$ and MoTe$_{2}$. |
| title | Ferroelectricity and related effects on carrier transport in type-II Weyl semimetal WTe$_{2}$ thin film |
| topic | Statistical Mechanics Materials Science |
| url | https://arxiv.org/abs/2112.10266 |