Superconductivity in pressurized Re$_{0.10}$Mo$_{0.90}$B$_2$
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arXiv
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916375837016064 |
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| author | Sinha, S. Lim, J. Li, Z. Kim, J. S. Hire, A. C. Dee, P. M. Kumar, R. S. Popov, D. Hemley, R. J. Hennig, R. G. Hirschfeld, P. J. Stewart, G. R. Hamlin, J. J. |
| author_facet | Sinha, S. Lim, J. Li, Z. Kim, J. S. Hire, A. C. Dee, P. M. Kumar, R. S. Popov, D. Hemley, R. J. Hennig, R. G. Hirschfeld, P. J. Stewart, G. R. Hamlin, J. J. |
| contents | The recent surprising discovery of superconductivity with critical temperature $T_c$ = 32 K in MoB$_2$ above 70 GPa has led to the search for related materials that may superconduct at similarly high $T_c$ values and lower pressures. We have studied the superconducting and structural properties of Re$_{0.10}$Mo$_{0.90}$B$_2$ to 170 GPa. A structural phase transition from R3m to P6/mmm commences at 48 GPa, with the first signatures of superconductivity appearing above 44 GPa. The critical temperature is observed to increase with pressure. A complete resistive transition is observed only above 150 GPa, where the highest onset $T_c$ of 30 K is also achieved. Upon releasing pressure, the high pressure superconducting phase is found to be metastable. During unloading, a complete resistive superconducting transition is observed all the way down to 20 GPa (with onset $T_c \sim 20$ K). Our results suggest that the P6/mmm structure is responsible for the observed superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_17416 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superconductivity in pressurized Re$_{0.10}$Mo$_{0.90}$B$_2$ Sinha, S. Lim, J. Li, Z. Kim, J. S. Hire, A. C. Dee, P. M. Kumar, R. S. Popov, D. Hemley, R. J. Hennig, R. G. Hirschfeld, P. J. Stewart, G. R. Hamlin, J. J. Superconductivity Materials Science The recent surprising discovery of superconductivity with critical temperature $T_c$ = 32 K in MoB$_2$ above 70 GPa has led to the search for related materials that may superconduct at similarly high $T_c$ values and lower pressures. We have studied the superconducting and structural properties of Re$_{0.10}$Mo$_{0.90}$B$_2$ to 170 GPa. A structural phase transition from R3m to P6/mmm commences at 48 GPa, with the first signatures of superconductivity appearing above 44 GPa. The critical temperature is observed to increase with pressure. A complete resistive transition is observed only above 150 GPa, where the highest onset $T_c$ of 30 K is also achieved. Upon releasing pressure, the high pressure superconducting phase is found to be metastable. During unloading, a complete resistive superconducting transition is observed all the way down to 20 GPa (with onset $T_c \sim 20$ K). Our results suggest that the P6/mmm structure is responsible for the observed superconductivity. |
| title | Superconductivity in pressurized Re$_{0.10}$Mo$_{0.90}$B$_2$ |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2408.17416 |