Observation of odd-parity superconductivity in UTe2
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866909967880028160 |
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| author | Li, Zixuan Moir, Camilla M. McKee, Nathan J. Lee-Wong, Eric Baumbach, Ryan E. Maple, M. Brian Liu, Ying |
| author_facet | Li, Zixuan Moir, Camilla M. McKee, Nathan J. Lee-Wong, Eric Baumbach, Ryan E. Maple, M. Brian Liu, Ying |
| contents | Symmetry properties of the order parameter are among the most fundamental characteristics of a superconductor. The pairing symmetry of recently discovered heavy fermion superconductor UTe2 featuring an exceedingly large upper critical field has attracted a great deal of attention. Even though it is widely believed that UTe2 possesses an odd-parity, spin-triplet pairing symmetry, direct evidence for it is lacking, especially at zero or low magnetic fields. We report here the selection-rule results of Josephson coupling between In, an s-wave superconductor, and UTe2. The orientation dependence of the Josephson coupling suggests very strongly that UTe2 possess an odd-parity pairing state of B_1u in zero magnetic fields. We also report the formation of Andreev surface bound states on the (1-10) surface of UTe2. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_08668 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of odd-parity superconductivity in UTe2 Li, Zixuan Moir, Camilla M. McKee, Nathan J. Lee-Wong, Eric Baumbach, Ryan E. Maple, M. Brian Liu, Ying Superconductivity Symmetry properties of the order parameter are among the most fundamental characteristics of a superconductor. The pairing symmetry of recently discovered heavy fermion superconductor UTe2 featuring an exceedingly large upper critical field has attracted a great deal of attention. Even though it is widely believed that UTe2 possesses an odd-parity, spin-triplet pairing symmetry, direct evidence for it is lacking, especially at zero or low magnetic fields. We report here the selection-rule results of Josephson coupling between In, an s-wave superconductor, and UTe2. The orientation dependence of the Josephson coupling suggests very strongly that UTe2 possess an odd-parity pairing state of B_1u in zero magnetic fields. We also report the formation of Andreev surface bound states on the (1-10) surface of UTe2. |
| title | Observation of odd-parity superconductivity in UTe2 |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2309.08668 |