Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIr$_2$B$_2$
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908333948010496 |
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| author | Kacmarcik, J. Pribulova, Z. Shiroka, T. Kosuth, F. Szabo, P. Winiarski, M. J. Krolak, S. Jaroszynski, J. Shang, T. Cava, R. J. Marcenat, C. Klein, T. Klimczuk, T. Samuely, P. |
| author_facet | Kacmarcik, J. Pribulova, Z. Shiroka, T. Kosuth, F. Szabo, P. Winiarski, M. J. Krolak, S. Jaroszynski, J. Shang, T. Cava, R. J. Marcenat, C. Klein, T. Klimczuk, T. Samuely, P. |
| contents | Non-centrosymmetric superconducting materials represent an exciting class of novel superconductors featuring a variety of unconventional properties, including mixed-parity pairing and very high upper critical fields. Here, we present a comprehensive study of TaIr$_2$B$_2$ (with $T_c$ = 5.1 K), using a set of complementary experimental methods, including bulk- and surface-sensitive techniques. We provide evidence that this system is a two-band, yet it behaves as a single-gap superconductor with a strong coupling. The upper critical field of TaIr$_2$B$_2$ significantly exceeds the Pauli limit and exhibits a nearly linear temperature dependence down to the lowest temperatures. This behavior, rarely seen in superconductors, is discussed in terms of anti-symmetric spin-orbit interaction, two-band-, and strong-coupling effects, as well as disorder. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00662 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIr$_2$B$_2$ Kacmarcik, J. Pribulova, Z. Shiroka, T. Kosuth, F. Szabo, P. Winiarski, M. J. Krolak, S. Jaroszynski, J. Shang, T. Cava, R. J. Marcenat, C. Klein, T. Klimczuk, T. Samuely, P. Superconductivity Non-centrosymmetric superconducting materials represent an exciting class of novel superconductors featuring a variety of unconventional properties, including mixed-parity pairing and very high upper critical fields. Here, we present a comprehensive study of TaIr$_2$B$_2$ (with $T_c$ = 5.1 K), using a set of complementary experimental methods, including bulk- and surface-sensitive techniques. We provide evidence that this system is a two-band, yet it behaves as a single-gap superconductor with a strong coupling. The upper critical field of TaIr$_2$B$_2$ significantly exceeds the Pauli limit and exhibits a nearly linear temperature dependence down to the lowest temperatures. This behavior, rarely seen in superconductors, is discussed in terms of anti-symmetric spin-orbit interaction, two-band-, and strong-coupling effects, as well as disorder. |
| title | Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIr$_2$B$_2$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2504.00662 |