Anisotropic field-induced changes in the superconducting order parameter of UTe_{2}
UTe_{2} is a newly discovered unconventional superconductor, where electron Cooper pairs combine into a spin-triplet ground state. We study the specific heat C(H,T) of a high-quality UTe_{2} single crystal, with a single anomaly at a high superconducting transition temperature T_{c}=2.1 K and a low...
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.L022053 |
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| author | Sangyun Lee Andrew J. Woods P. F. S. Rosa S. M. Thomas E. D. Bauer Shi-Zeng Lin R. Movshovich |
| author_facet | Sangyun Lee Andrew J. Woods P. F. S. Rosa S. M. Thomas E. D. Bauer Shi-Zeng Lin R. Movshovich |
| author_sort | Sangyun Lee |
| collection | DOAJ |
| description | UTe_{2} is a newly discovered unconventional superconductor, where electron Cooper pairs combine into a spin-triplet ground state. We study the specific heat C(H,T) of a high-quality UTe_{2} single crystal, with a single anomaly at a high superconducting transition temperature T_{c}=2.1 K and a low residual Sommerfeld coefficient γ_{0}. Applying magnetic fields up to 12 T along the crystallographic axes a, b, and c, we observe highly anisotropic behavior in γ_{0}(H). Below 4 T, γ_{0}(H)≈γ0+λi√H (i=a,b,c), which is expected for an unconventional superconductor with nodes on the Fermi surface away from the direction of the magnetic field. At 4 T (a and b axes) and 5.5 T (c axis), distinctive changes in the behavior of γ_{0}(H) suggest that a stable low-field ground state begins to evolve above 4 T. The data analysis indicates that the nodes are located near the a–b plane, with possible order parameters d_{B2u}+iɛd_{B1u} or d_{B2u}+iɛd_{Au}. Our findings support B_{2u} as the primary superconducting order parameter in UTe_{2}. |
| format | Article |
| id | doaj-art-8c176be5ab0f4b6ebc13b358e92e0580 |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | American Physical Society |
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| series | Physical Review Research |
| spelling | doaj-art-8c176be5ab0f4b6ebc13b358e92e05802025-08-20T03:24:48ZengAmerican Physical SocietyPhysical Review Research2643-15642025-06-0172L02205310.1103/PhysRevResearch.7.L022053Anisotropic field-induced changes in the superconducting order parameter of UTe_{2}Sangyun LeeAndrew J. WoodsP. F. S. RosaS. M. ThomasE. D. BauerShi-Zeng LinR. MovshovichUTe_{2} is a newly discovered unconventional superconductor, where electron Cooper pairs combine into a spin-triplet ground state. We study the specific heat C(H,T) of a high-quality UTe_{2} single crystal, with a single anomaly at a high superconducting transition temperature T_{c}=2.1 K and a low residual Sommerfeld coefficient γ_{0}. Applying magnetic fields up to 12 T along the crystallographic axes a, b, and c, we observe highly anisotropic behavior in γ_{0}(H). Below 4 T, γ_{0}(H)≈γ0+λi√H (i=a,b,c), which is expected for an unconventional superconductor with nodes on the Fermi surface away from the direction of the magnetic field. At 4 T (a and b axes) and 5.5 T (c axis), distinctive changes in the behavior of γ_{0}(H) suggest that a stable low-field ground state begins to evolve above 4 T. The data analysis indicates that the nodes are located near the a–b plane, with possible order parameters d_{B2u}+iɛd_{B1u} or d_{B2u}+iɛd_{Au}. Our findings support B_{2u} as the primary superconducting order parameter in UTe_{2}.http://doi.org/10.1103/PhysRevResearch.7.L022053 |
| spellingShingle | Sangyun Lee Andrew J. Woods P. F. S. Rosa S. M. Thomas E. D. Bauer Shi-Zeng Lin R. Movshovich Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} Physical Review Research |
| title | Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} |
| title_full | Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} |
| title_fullStr | Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} |
| title_full_unstemmed | Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} |
| title_short | Anisotropic field-induced changes in the superconducting order parameter of UTe_{2} |
| title_sort | anisotropic field induced changes in the superconducting order parameter of ute 2 |
| url | http://doi.org/10.1103/PhysRevResearch.7.L022053 |
| work_keys_str_mv | AT sangyunlee anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT andrewjwoods anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT pfsrosa anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT smthomas anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT edbauer anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT shizenglin anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 AT rmovshovich anisotropicfieldinducedchangesinthesuperconductingorderparameterofute2 |