Ti4Ir2O a time-reversal-invariant fully gapped unconventional superconductor
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arXiv
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| Format: | Preprint |
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2024
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| author | Das, Debarchan Ma, KeYuan Jaroszynski, Jan Sazgari, Vahid Klimczuk, Tomasz von Rohr, Fabian O. Guguchia, Zurab |
| author_facet | Das, Debarchan Ma, KeYuan Jaroszynski, Jan Sazgari, Vahid Klimczuk, Tomasz von Rohr, Fabian O. Guguchia, Zurab |
| contents | Here we report muon spin rotation (muSR) experiments on the temperature and field dependence of the effective magnetic penetration depth (lambda) in the eta-carbide-type suboxide Ti4Ir2O, a superconductor with an considerably high upper critical field. Temperature dependence of penetration depth, obtained from transverse-field (TF)-muSR measurements, is in perfect agreement with an isotropic fully gaped superconducting state. Furthermore, our ZF muSR results confirm that the time-reversal symmetry is preserved in the superconducting state. We find, however, a notably low ratio of 1.22 between the superconducting critical temperature and the superfluid density. This value is close to most unconventional superconductors, showing that a very small superfluid density is present in the superconducting state of Ti4Ir2O. The presented results will pave the way for further theoretical and experimental investigations to obtain a microscopic understanding of the origin of such a high upper critical field in an isotropic single gap superconducting system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_13485 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ti4Ir2O a time-reversal-invariant fully gapped unconventional superconductor Das, Debarchan Ma, KeYuan Jaroszynski, Jan Sazgari, Vahid Klimczuk, Tomasz von Rohr, Fabian O. Guguchia, Zurab Superconductivity Materials Science Here we report muon spin rotation (muSR) experiments on the temperature and field dependence of the effective magnetic penetration depth (lambda) in the eta-carbide-type suboxide Ti4Ir2O, a superconductor with an considerably high upper critical field. Temperature dependence of penetration depth, obtained from transverse-field (TF)-muSR measurements, is in perfect agreement with an isotropic fully gaped superconducting state. Furthermore, our ZF muSR results confirm that the time-reversal symmetry is preserved in the superconducting state. We find, however, a notably low ratio of 1.22 between the superconducting critical temperature and the superfluid density. This value is close to most unconventional superconductors, showing that a very small superfluid density is present in the superconducting state of Ti4Ir2O. The presented results will pave the way for further theoretical and experimental investigations to obtain a microscopic understanding of the origin of such a high upper critical field in an isotropic single gap superconducting system. |
| title | Ti4Ir2O a time-reversal-invariant fully gapped unconventional superconductor |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2401.13485 |