| Autor: |
M. O. Ajeesh, M. Bordelon, C. Girod, S. Mishra, F. Ronning, E. D. Bauer, B. Maiorov, J. D. Thompson, P. F. S. Rosa, S. M. Thomas |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Physical Review X, Vol 13, Iss 4, p 041019 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.13.041019 |
| Popis: |
Topological superconductivity is a long-sought state of matter in bulk materials, and the odd-parity superconductor UTe_{2} is a prime candidate. The recent observation of a field-trainable spontaneous Kerr signal in UTe_{2} at the onset of superconductivity provides strong evidence that the superconducting order parameter is multicomponent and breaks time-reversal symmetry. Here, we perform Kerr effect measurements on a number of UTe_{2} samples—grown via both chemical vapor transport and the molten-salt-flux methods—that show a single superconducting transition between 1.6 K and 2.1 K. Our results show no evidence for a spontaneous Kerr signal in zero-field measurements. This implies that the superconducting state of UTe_{2} does not intrinsically break time-reversal symmetry. Instead, we observe a field-trainable signal that varies in magnitude between samples and between different locations on a single sample, which is a sign of inhomogeneous magnetic regions. Our results provide an examination of representative UTe_{2} samples and place strong constraints on the superconducting order parameter of UTe_{2}. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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