Field-Induced Tuning of the Pairing State in a Superconductor
The recently discovered superconductor UTe_{2}, with a superconducting transition temperature T_{c} between 1.5 and 2 K, is attracting much attention due to strong suspicion of spin-triplet and topological superconductivity. Its properties under magnetic field are also remarkable, with field-reinfor...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-02-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.13.011022 |
| _version_ | 1828009792669483008 |
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| author | A. Rosuel C. Marcenat G. Knebel T. Klein A. Pourret N. Marquardt Q. Niu S. Rousseau A. Demuer G. Seyfarth G. Lapertot D. Aoki D. Braithwaite J. Flouquet J. P. Brison |
| author_facet | A. Rosuel C. Marcenat G. Knebel T. Klein A. Pourret N. Marquardt Q. Niu S. Rousseau A. Demuer G. Seyfarth G. Lapertot D. Aoki D. Braithwaite J. Flouquet J. P. Brison |
| author_sort | A. Rosuel |
| collection | DOAJ |
| description | The recently discovered superconductor UTe_{2}, with a superconducting transition temperature T_{c} between 1.5 and 2 K, is attracting much attention due to strong suspicion of spin-triplet and topological superconductivity. Its properties under magnetic field are also remarkable, with field-reinforced (H∥b) and field-induced [H in the (b,c) plane] superconducting phases. Here, we report the first complete thermodynamic determination of the phase diagram for fields applied along the three crystallographic directions. For field along the easy a axis, we uncover a strong negative curvature of the upper critical field very close to T_{c}, revealing a strong suppression of the pairing strength at low magnetic fields. By contrast, measurements performed up to 36 T along the hard magnetization b axis confirm a bulk field-reinforced superconducting phase. Most of all, they also reveal the existence of a phase transition line within the superconducting phase. Drastic differences occur between the low-field and high-field phases pointing to different pairing mechanisms. Detailed analysis suggests a possible transition between a low-field spin-triplet to high-field spin-singlet state, a unique case among superconductors. |
| first_indexed | 2024-04-10T08:44:05Z |
| format | Article |
| id | doaj.art-d01316ee42454af18298ff9b22e4009e |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-04-10T08:44:05Z |
| publishDate | 2023-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-d01316ee42454af18298ff9b22e4009e2023-02-22T15:10:45ZengAmerican Physical SocietyPhysical Review X2160-33082023-02-0113101102210.1103/PhysRevX.13.011022Field-Induced Tuning of the Pairing State in a SuperconductorA. RosuelC. MarcenatG. KnebelT. KleinA. PourretN. MarquardtQ. NiuS. RousseauA. DemuerG. SeyfarthG. LapertotD. AokiD. BraithwaiteJ. FlouquetJ. P. BrisonThe recently discovered superconductor UTe_{2}, with a superconducting transition temperature T_{c} between 1.5 and 2 K, is attracting much attention due to strong suspicion of spin-triplet and topological superconductivity. Its properties under magnetic field are also remarkable, with field-reinforced (H∥b) and field-induced [H in the (b,c) plane] superconducting phases. Here, we report the first complete thermodynamic determination of the phase diagram for fields applied along the three crystallographic directions. For field along the easy a axis, we uncover a strong negative curvature of the upper critical field very close to T_{c}, revealing a strong suppression of the pairing strength at low magnetic fields. By contrast, measurements performed up to 36 T along the hard magnetization b axis confirm a bulk field-reinforced superconducting phase. Most of all, they also reveal the existence of a phase transition line within the superconducting phase. Drastic differences occur between the low-field and high-field phases pointing to different pairing mechanisms. Detailed analysis suggests a possible transition between a low-field spin-triplet to high-field spin-singlet state, a unique case among superconductors.http://doi.org/10.1103/PhysRevX.13.011022 |
| spellingShingle | A. Rosuel C. Marcenat G. Knebel T. Klein A. Pourret N. Marquardt Q. Niu S. Rousseau A. Demuer G. Seyfarth G. Lapertot D. Aoki D. Braithwaite J. Flouquet J. P. Brison Field-Induced Tuning of the Pairing State in a Superconductor Physical Review X |
| title | Field-Induced Tuning of the Pairing State in a Superconductor |
| title_full | Field-Induced Tuning of the Pairing State in a Superconductor |
| title_fullStr | Field-Induced Tuning of the Pairing State in a Superconductor |
| title_full_unstemmed | Field-Induced Tuning of the Pairing State in a Superconductor |
| title_short | Field-Induced Tuning of the Pairing State in a Superconductor |
| title_sort | field induced tuning of the pairing state in a superconductor |
| url | http://doi.org/10.1103/PhysRevX.13.011022 |
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