Limited coincidence between ultrahigh-field superconductivity and line of metamagnetic endpoints in UTe$_2$
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arXiv
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| Format: | Preprint |
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2026
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| author | Czajka, Peter Lewin, Sylvia K. Halloran, Thomas Frank, Corey E. Salas, Gicela Saucedo Noe II, G. Timothy Ran, Sheng Singleton, John Butch, Nicholas P. |
| author_facet | Czajka, Peter Lewin, Sylvia K. Halloran, Thomas Frank, Corey E. Salas, Gicela Saucedo Noe II, G. Timothy Ran, Sheng Singleton, John Butch, Nicholas P. |
| contents | The field-dependent magnetization of UTe$_2$ was measured through the metamagnetic transition at a variety of field angles, tracking how the step in magnetization evolves with fields tilted away from the $b$ axis. For fields oriented within the $ab$ plane, jumps in both $M_a$ and $M_b$ vanish approximately 18° away from the $b$ axis. From contactless conductivity measurements, we find that the halo-like high-field superconducting region extends to the $ab$ plane, where it exists only within a very narrow ($<$1°) angular range near the termination of the metamagnetic phase boundary and extends beyond the highest measured field of 73 T. As the field orientation tilts towards the $c$ axis, the superconducting and metamagnetic phase boundaries no longer coincide and exhibit distinct trends. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03500 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Limited coincidence between ultrahigh-field superconductivity and line of metamagnetic endpoints in UTe$_2$ Czajka, Peter Lewin, Sylvia K. Halloran, Thomas Frank, Corey E. Salas, Gicela Saucedo Noe II, G. Timothy Ran, Sheng Singleton, John Butch, Nicholas P. Superconductivity The field-dependent magnetization of UTe$_2$ was measured through the metamagnetic transition at a variety of field angles, tracking how the step in magnetization evolves with fields tilted away from the $b$ axis. For fields oriented within the $ab$ plane, jumps in both $M_a$ and $M_b$ vanish approximately 18° away from the $b$ axis. From contactless conductivity measurements, we find that the halo-like high-field superconducting region extends to the $ab$ plane, where it exists only within a very narrow ($<$1°) angular range near the termination of the metamagnetic phase boundary and extends beyond the highest measured field of 73 T. As the field orientation tilts towards the $c$ axis, the superconducting and metamagnetic phase boundaries no longer coincide and exhibit distinct trends. |
| title | Limited coincidence between ultrahigh-field superconductivity and line of metamagnetic endpoints in UTe$_2$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2603.03500 |