Enhanced triplet superconductivity in next generation ultraclean UTe2
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914942106468352 |
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| author | Wu, Z. Weinberger, T. I. Chen, J. Cabala, A. Chichinadze, D. V. Shaffer, D. Pospisil, J. Prokleska, J. Haidamak, T. Bastien, G. Sechovsky, V. Hickey, A. J. Mancera-Ugarte, M. J. Benjamin, S. Graf, D. E. Skourski, Y. Lonzarich, G. G. Valiska, M. Grosche, F. M. Eaton, A. G. |
| author_facet | Wu, Z. Weinberger, T. I. Chen, J. Cabala, A. Chichinadze, D. V. Shaffer, D. Pospisil, J. Prokleska, J. Haidamak, T. Bastien, G. Sechovsky, V. Hickey, A. J. Mancera-Ugarte, M. J. Benjamin, S. Graf, D. E. Skourski, Y. Lonzarich, G. G. Valiska, M. Grosche, F. M. Eaton, A. G. |
| contents | The unconventional superconductor UTe$_2$ exhibits numerous signatures of spin-triplet superconductivity -- a rare state of matter which could enable quantum computation protected against decoherence. UTe$_2$ possesses a complex phase landscape comprising two magnetic field-induced superconducting phases, a metamagnetic transition to a field-polarised state, along with pair- and charge-density wave orders. However, contradictory reports between studies performed on UTe$_2$ specimens of varying quality have severely impeded theoretical efforts to understand the microscopic origins of the exotic superconductivity. Here, we report a comprehensive suite of high magnetic field measurements on a new generation of pristine quality UTe$_2$ crystals. Our experiments reveal a significantly revised high magnetic field superconducting phase diagram in the ultraclean limit, showing a pronounced sensitivity of field-induced superconductivity to the presence of crystalline disorder. We employ a Ginzburg-Landau model that excellently captures this acute dependence on sample quality. Our results suggest that in close proximity to a field--induced metamagnetic transition the enhanced role of magnetic fluctuations -- that are strongly suppressed by disorder -- is likely responsible for tuning UTe$_2$ between two distinct spin-triplet superconducting phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_19033 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Enhanced triplet superconductivity in next generation ultraclean UTe2 Wu, Z. Weinberger, T. I. Chen, J. Cabala, A. Chichinadze, D. V. Shaffer, D. Pospisil, J. Prokleska, J. Haidamak, T. Bastien, G. Sechovsky, V. Hickey, A. J. Mancera-Ugarte, M. J. Benjamin, S. Graf, D. E. Skourski, Y. Lonzarich, G. G. Valiska, M. Grosche, F. M. Eaton, A. G. Superconductivity Strongly Correlated Electrons The unconventional superconductor UTe$_2$ exhibits numerous signatures of spin-triplet superconductivity -- a rare state of matter which could enable quantum computation protected against decoherence. UTe$_2$ possesses a complex phase landscape comprising two magnetic field-induced superconducting phases, a metamagnetic transition to a field-polarised state, along with pair- and charge-density wave orders. However, contradictory reports between studies performed on UTe$_2$ specimens of varying quality have severely impeded theoretical efforts to understand the microscopic origins of the exotic superconductivity. Here, we report a comprehensive suite of high magnetic field measurements on a new generation of pristine quality UTe$_2$ crystals. Our experiments reveal a significantly revised high magnetic field superconducting phase diagram in the ultraclean limit, showing a pronounced sensitivity of field-induced superconductivity to the presence of crystalline disorder. We employ a Ginzburg-Landau model that excellently captures this acute dependence on sample quality. Our results suggest that in close proximity to a field--induced metamagnetic transition the enhanced role of magnetic fluctuations -- that are strongly suppressed by disorder -- is likely responsible for tuning UTe$_2$ between two distinct spin-triplet superconducting phases. |
| title | Enhanced triplet superconductivity in next generation ultraclean UTe2 |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2305.19033 |