Revisiting YH$_9$ Superconductivity and Predicting High-T$_c$ in GdYH$_5$
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914089615228928 |
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| author | Rastkhadiv, M. A. |
| author_facet | Rastkhadiv, M. A. |
| contents | The discovery of superconductivity in $\mathrm{YH_{9}}$ with a critical temperature of approximately $T_c\sim 243 \ K$ has opened a new window toward room temperature superconductivity. In this work, we employ the lowest order constrained variational method to investigate the thermodynamic and magnetic properties of the $\mathrm{YH_{9}}$ structure, obtaining results in good agreement with experimental data. % Based on the robustness of the LOCV approach for describing high-$T_c$ superconductors, we further extend our analysis to the gadolinium-yttrium-hydrogen system across various stoichiometries. The key finding of this study is the prediction of a superconducting phase transition at $T_c = 223.2~\mathrm{K}$ for $\mathrm{GdYH_{5}}$ under a critical pressure of approximately $157~\mathrm{GPa}$. This compound crystallizes in a tetragonal structure with space group $P4/mmm$. Moreover, the calculated gap ratio confirms that $\mathrm{GdYH_{5}}$ is a type-II superconductor with a critical current density suitable for potential industrial applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_10720 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revisiting YH$_9$ Superconductivity and Predicting High-T$_c$ in GdYH$_5$ Rastkhadiv, M. A. Superconductivity The discovery of superconductivity in $\mathrm{YH_{9}}$ with a critical temperature of approximately $T_c\sim 243 \ K$ has opened a new window toward room temperature superconductivity. In this work, we employ the lowest order constrained variational method to investigate the thermodynamic and magnetic properties of the $\mathrm{YH_{9}}$ structure, obtaining results in good agreement with experimental data. % Based on the robustness of the LOCV approach for describing high-$T_c$ superconductors, we further extend our analysis to the gadolinium-yttrium-hydrogen system across various stoichiometries. The key finding of this study is the prediction of a superconducting phase transition at $T_c = 223.2~\mathrm{K}$ for $\mathrm{GdYH_{5}}$ under a critical pressure of approximately $157~\mathrm{GPa}$. This compound crystallizes in a tetragonal structure with space group $P4/mmm$. Moreover, the calculated gap ratio confirms that $\mathrm{GdYH_{5}}$ is a type-II superconductor with a critical current density suitable for potential industrial applications. |
| title | Revisiting YH$_9$ Superconductivity and Predicting High-T$_c$ in GdYH$_5$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2510.10720 |