Superconductivity in ternary Mg$_4$Pd$_7$As$_6$
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911986627903488 |
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| author | Świątek, Hanna Gutowska, Sylwia Winiarski, Michał J. Wiendlocha, Bartlomiej Klimczuk, Tomasz |
| author_facet | Świątek, Hanna Gutowska, Sylwia Winiarski, Michał J. Wiendlocha, Bartlomiej Klimczuk, Tomasz |
| contents | We report the synthesis and characterization of a new compound Mg$_4$Pd$_7$As$_6$, which was found to be a superconductor with $T_c=5.45$~K. Powder X-ray diffraction confirms the U$_4$Re$_7$Si$_6$ structure (space group $Im$-$3m$, no. 229) with the lattice parameter $a$ = 8.2572(1)~Å. Magnetization, specific heat, and electrical resistivity measurements indicate that it is a moderate-coupling ($λ= 0.72$) type-II superconductor. The electronic and phonon structures are calculated, highlighting the importance of antibonding Pd-As interactions in determining the properties of this material. The calculated electron-phonon copling parameter $λ= 0.76$ agrees very well with the experimental finding, which confirms the conventional pairing mechanism in Mg$_4$Pd$_7$As$_6$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_06813 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superconductivity in ternary Mg$_4$Pd$_7$As$_6$ Świątek, Hanna Gutowska, Sylwia Winiarski, Michał J. Wiendlocha, Bartlomiej Klimczuk, Tomasz Superconductivity We report the synthesis and characterization of a new compound Mg$_4$Pd$_7$As$_6$, which was found to be a superconductor with $T_c=5.45$~K. Powder X-ray diffraction confirms the U$_4$Re$_7$Si$_6$ structure (space group $Im$-$3m$, no. 229) with the lattice parameter $a$ = 8.2572(1)~Å. Magnetization, specific heat, and electrical resistivity measurements indicate that it is a moderate-coupling ($λ= 0.72$) type-II superconductor. The electronic and phonon structures are calculated, highlighting the importance of antibonding Pd-As interactions in determining the properties of this material. The calculated electron-phonon copling parameter $λ= 0.76$ agrees very well with the experimental finding, which confirms the conventional pairing mechanism in Mg$_4$Pd$_7$As$_6$. |
| title | Superconductivity in ternary Mg$_4$Pd$_7$As$_6$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2408.06813 |